mirror of
https://github.com/OpenHFT/Chronicle-Map.git
synced 2021-09-13 01:26:12 +00:00
942 lines
37 KiB
Java
942 lines
37 KiB
Java
/*
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* Copyright 2014 Higher Frequency Trading
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*
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* http://www.higherfrequencytrading.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.openhft.chronicle.map;
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import net.openhft.chronicle.hash.*;
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import net.openhft.chronicle.hash.replication.*;
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import net.openhft.chronicle.hash.serialization.BytesReader;
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import net.openhft.chronicle.hash.serialization.BytesWriter;
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import net.openhft.chronicle.hash.serialization.SizeMarshaller;
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import net.openhft.chronicle.hash.serialization.internal.MetaBytesInterop;
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import net.openhft.chronicle.hash.serialization.internal.MetaBytesWriter;
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import net.openhft.chronicle.hash.serialization.internal.MetaProvider;
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import net.openhft.chronicle.set.ChronicleSetBuilder;
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import net.openhft.lang.Maths;
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import net.openhft.lang.io.ByteBufferBytes;
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import net.openhft.lang.io.Bytes;
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import net.openhft.lang.io.BytesStore;
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import net.openhft.lang.io.DirectStore;
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import net.openhft.lang.io.serialization.*;
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import net.openhft.lang.io.serialization.impl.AllocateInstanceObjectFactory;
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import net.openhft.lang.io.serialization.impl.NewInstanceObjectFactory;
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import net.openhft.lang.io.serialization.impl.VanillaBytesMarshallerFactory;
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import net.openhft.lang.model.Byteable;
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import net.openhft.lang.threadlocal.Provider;
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import net.openhft.lang.threadlocal.ThreadLocalCopies;
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import org.jetbrains.annotations.NotNull;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.*;
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import java.net.InetSocketAddress;
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import java.nio.ByteBuffer;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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import static net.openhft.chronicle.map.Objects.builderEquals;
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/**
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* {@code AbstractChronicleMapBuilder} manages most of {@link ChronicleMap} configurations; has two
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* concrete subclasses: {@link ChronicleMapBuilder} should be used to create maps with ordinary
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* values, {@link OffHeapUpdatableChronicleMapBuilder} -- maps with {@link Byteable} values, which
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* point directly to off-heap memory; could be used as a classic builder and/or factory. This means
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* that in addition to the standard builder usage pattern: <pre>{@code
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* ChronicleMap<Key, Value> map = ChronicleMapBuilder
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* .of(Key.class, Value.class)
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* .entries(100500)
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* // ... other configurations
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* .create();}</pre>
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* one of concrete {@code AbstractChronicleMapBuilder} subclasses, {@link ChronicleMapBuilder} or
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* {@link OffHeapUpdatableChronicleMapBuilder}, could be prepared and used to create many similar
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* maps: <pre>{@code
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* OffHeapUpdatableChronicleMapBuilder<Key, Value> builder = OffHeapUpdatableChronicleMapBuilder
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* .of(Key.class, Value.class)
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* .entries(100500);
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*
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* ChronicleMap<Key, Value> map1 = builder.create();
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* ChronicleMap<Key, Value> map2 = builder.create();}</pre>
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* i. e. created {@code ChronicleMap} instances don't depend on the builder.
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*
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* <p>{@code AbstractChronicleMapBuilder} and it's subclasses are mutable, see a note in {@link
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* ChronicleHashBuilder} interface documentation. </p> <p>Later in this documentation,
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* "ChronicleMap" means "ChronicleMaps, created by {@code AbstractChronicleMapBuilder}", unless
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* specified different, because theoretically someone might provide {@code ChronicleMap}
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* implementations with completely different properties. </p> <p>{@code ChronicleMap}
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* ("ChronicleMaps, created by {@code AbstractChronicleMapBuilder}") currently doesn't support
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* resizing. That is why you should <i>always</i> configure {@linkplain #entries(long) number of
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* entries} you are going to insert into the created map <i>at most</i>. See {@link #entries(long)}
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* method documentation for more information on this. </p> <p>{@code ChronicleMap} allocates memory
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* by equally sized chunks. This size is called {@linkplain #entrySize(int) entry size}, you are
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* strongly recommended to configure it to achieve least memory consumption and best speed. See
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* {@link #entrySize(int)} method documentation for more information on this. </p>
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*
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* @param <K> key type of the maps, produced by this builder
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* @param <V> value type of the maps, produced by this builder
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* @see ChronicleMap
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* @see ChronicleSetBuilder
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*/
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public abstract class AbstractChronicleMapBuilder<K, V,
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B extends AbstractChronicleMapBuilder<K, V, B>>
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implements Cloneable, ChronicleHashBuilder<K, ChronicleMap<K, V>, B> {
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static final short UDP_REPLICATION_MODIFICATION_ITERATOR_ID = 128;
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private static final Bytes EMPTY_BYTES = new ByteBufferBytes(ByteBuffer.allocate(0));
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private static final int DEFAULT_KEY_OR_VALUE_SIZE = 120;
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private static final int MAX_SEGMENTS = (1 << 30);
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private static final int MAX_SEGMENTS_TO_CHAISE_COMPACT_MULTI_MAPS = (1 << 20);
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private static final Logger LOG =
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LoggerFactory.getLogger(AbstractChronicleMapBuilder.class.getName());
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SerializationBuilder<K> keyBuilder;
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SerializationBuilder<V> valueBuilder;
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// used when configuring the number of segments.
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private int minSegments = -1;
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private int actualSegments = -1;
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// used when reading the number of entries per
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private long actualEntriesPerSegment = -1L;
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private int keySize = 0;
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private K sampleKey;
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private int valueSize = 0;
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private V sampleValue;
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private int entrySize = 0;
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private Alignment alignment = null;
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private long entries = 1 << 20; // 1 million by default
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private long lockTimeOut = 2000;
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private TimeUnit lockTimeOutUnit = TimeUnit.MILLISECONDS;
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private int metaDataBytes = 0;
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private ChronicleHashErrorListener errorListener = ChronicleHashErrorListeners.logging();
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private boolean putReturnsNull = false;
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private boolean removeReturnsNull = false;
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// replication
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private TimeProvider timeProvider = TimeProvider.SYSTEM;
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private BytesMarshallerFactory bytesMarshallerFactory;
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private ObjectSerializer objectSerializer;
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private MapEventListener<K, V, ChronicleMap<K, V>> eventListener =
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MapEventListeners.nop();
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private V defaultValue = null;
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private DefaultValueProvider<K, V> defaultValueProvider = NullValueProvider.INSTANCE;
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private PrepareValueBytes<K, V> prepareValueBytes = null;
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private SimpleReplication simpleReplication = null;
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AbstractChronicleMapBuilder(Class<K> keyClass, Class<V> valueClass) {
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keyBuilder = new SerializationBuilder<K>(keyClass, SerializationBuilder.Role.KEY);
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valueBuilder = new SerializationBuilder<V>(valueClass, SerializationBuilder.Role.VALUE);
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}
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protected static boolean offHeapReference(Class valueClass) {
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return Byteable.class.isAssignableFrom(valueClass);
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}
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private static long roundUpMapHeaderSize(long headerSize) {
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long roundUp = (headerSize + 127L) & ~127L;
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if (roundUp - headerSize < 64)
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roundUp += 128;
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return roundUp;
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}
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private static void checkSegments(int segments) {
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if (segments <= 0 || segments > MAX_SEGMENTS)
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throw new IllegalArgumentException("segments should be positive, " +
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segments + " given");
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if (segments > MAX_SEGMENTS)
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throw new IllegalArgumentException("Max segments is " + MAX_SEGMENTS + ", " +
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segments + " given");
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}
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private static long divideUpper(long dividend, long divisor) {
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return ((dividend - 1L) / divisor) + 1L;
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}
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private static String pretty(int value) {
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return value > 0 ? value + "" : "not configured";
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}
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private static String pretty(Object obj) {
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return obj != null ? obj + "" : "not configured";
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}
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@Override
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public B clone() {
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try {
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@SuppressWarnings("unchecked")
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final B result = (B) super.clone();
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result.keyBuilder = keyBuilder.clone();
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result.valueBuilder = valueBuilder.clone();
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return result;
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} catch (CloneNotSupportedException e) {
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throw new AssertionError(e);
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}
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}
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abstract B self();
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/**
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* {@inheritDoc}
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*
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* <p>Example: if keys in your map(s) are English words in {@link String} form, keys size 10
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* (a bit more than average English word length) would be a good choice: <pre>{@code
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* ChronicleMap<String, LongValue> wordFrequencies = OffHeapUpdatableChronicleMapBuilder
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* .of(String.class, LongValue.class)
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* .entries(50000)
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* .keySize(10)
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* // shouldn't specify valueSize(), because it is statically known
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* .create();}</pre>
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* (Note that 10 is chosen as key size in bytes despite strings in Java are UTF-16 encoded (and
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* each character takes 2 bytes on-heap), because default off-heap {@link String} encoding is
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* UTF-8 in {@code ChronicleMap}.)
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*
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* @see #constantKeySizeBySample(Object)
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* @see #entrySize(int)
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*/
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@Override
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public B keySize(int keySize) {
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if (keySize <= 0)
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throw new IllegalArgumentException("Key size must be positive");
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this.keySize = keySize;
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return self();
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}
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/**
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* {@inheritDoc}
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*
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* <p>For example, if your keys are Git commit hashes:<pre>{@code
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* Map<byte[], String> gitCommitMessagesByHash =
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* ChronicleMapBuilder.of(byte[].class, String.class)
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* .constantKeySizeBySample(new byte[20])
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* .create();}</pre>
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*
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* @see #keySize(int)
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*/
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@Override
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public B constantKeySizeBySample(K sampleKey) {
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this.sampleKey = sampleKey;
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return self();
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}
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private int keySize() {
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return keyOrValueSize(keySize, keyBuilder);
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}
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B valueSize(int valueSize) {
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if (valueSize <= 0)
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throw new IllegalArgumentException("Value size must be positive");
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this.valueSize = valueSize;
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return self();
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}
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B constantValueSizeBySample(V sampleValue) {
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this.sampleValue = sampleValue;
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return self();
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}
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int valueSize() {
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return keyOrValueSize(valueSize, valueBuilder);
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}
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private int keyOrValueSize(int configuredSize, SerializationBuilder builder) {
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if (configuredSize > 0)
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return configuredSize;
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// this means size is statically known
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if (builder.sizeMarshaller().sizeEncodingSize(0L) == 0)
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return (int) builder.sizeMarshaller().readSize(EMPTY_BYTES);
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return DEFAULT_KEY_OR_VALUE_SIZE;
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}
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/**
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* {@inheritDoc}
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*
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* <p>In fully default case you can expect entry size to be about 256 bytes. But it is strongly
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* recommended always to configure {@linkplain #keySize(int) key size} and {@linkplain
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* #valueSize(int) value size}, if they couldn't be derived statically. </p> <p>If entry size is
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* not configured explicitly by calling this method, it is computed based on {@linkplain
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* #metaDataBytes(int) meta data bytes}, plus {@linkplain #keySize(int) key size}, plus
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* {@linkplain #valueSize(int) value size}, plus a few bytes required by implementations. </p>
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*
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* @see #entries(long)
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*/
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@Override
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public B entrySize(int entrySize) {
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if (entrySize <= 0)
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throw new IllegalArgumentException("Entry Size must be positive");
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this.entrySize = entrySize;
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return self();
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}
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int entrySize(boolean replicated) {
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if (entrySize > 0)
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return entryAndValueAlignment().alignSize(entrySize);
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int size = metaDataBytes;
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int keySize = keySize();
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size += keyBuilder.sizeMarshaller().sizeEncodingSize(keySize);
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size += keySize;
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if (replicated)
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size += ReplicatedChronicleMap.ADDITIONAL_ENTRY_BYTES;
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int valueSize = valueSize();
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size += valueBuilder.sizeMarshaller().sizeEncodingSize(valueSize);
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size = entryAndValueAlignment().alignSize(size);
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size += valueSize;
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// Some cache line heuristics
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for (int i = 1; i <= 4; i++) {
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int bound = i * 64;
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// Not more than 5% oversize.
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// DEFAULT_KEY_OR_VALUE_SIZE and this heuristic are specially adjusted to produce
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// entry size 256 -- the default value prior to keySize and valueSize -- when key and
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// value sizes are both not static nor configured, in both vanilla and replicated modes.
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if (size < bound && (bound - size) <= bound / 20) {
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size = bound;
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break;
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}
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}
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return entryAndValueAlignment().alignSize(size);
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}
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B entryAndValueAlignment(Alignment alignment) {
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this.alignment = alignment;
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return self();
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}
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Alignment entryAndValueAlignment() {
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if (alignment != null)
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return alignment;
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return offHeapReference(valueBuilder.eClass) ? Alignment.OF_4_BYTES : Alignment.NO_ALIGNMENT;
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}
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@Override
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public B entries(long entries) {
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if (entries <= 0L)
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throw new IllegalArgumentException("Entries should be positive, " + entries + " given");
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this.entries = entries;
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return self();
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}
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long entries() {
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return entries;
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}
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@Override
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public B actualEntriesPerSegment(long actualEntriesPerSegment) {
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if (actualEntriesPerSegment <= 0L)
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throw new IllegalArgumentException("entries per segment should be positive, " +
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actualEntriesPerSegment + " given");
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if (tooManyEntriesPerSegment(actualEntriesPerSegment))
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throw new IllegalArgumentException("max entries per segment is " +
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VanillaIntIntMultiMap.MAX_CAPACITY + ", " + actualEntriesPerSegment + " given");
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this.actualEntriesPerSegment = actualEntriesPerSegment;
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return self();
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}
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private boolean tooManyEntriesPerSegment(long entriesPerSegment) {
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return entriesPerSegment > VanillaIntIntMultiMap.MAX_CAPACITY;
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}
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long actualEntriesPerSegment() {
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if (actualEntriesPerSegment > 0L)
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return actualEntriesPerSegment;
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int actualSegments = actualSegments();
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long actualEntries = totalEntriesIfPoorDistribution(actualSegments);
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long actualEntriesPerSegment = divideUpper(actualEntries, actualSegments);
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if (tooManyEntriesPerSegment(actualEntriesPerSegment))
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throw new IllegalStateException("max entries per segment is " +
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VanillaIntIntMultiMap.MAX_CAPACITY + " configured entries() and " +
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"actualSegments() so that there should be " + actualEntriesPerSegment +
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" entries per segment");
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return actualEntriesPerSegment;
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}
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private long totalEntriesIfPoorDistribution(int segments) {
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if (segments == 1)
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return entries;
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double poorDistEntriesScale = Math.log(segments) * entries;
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if (segments <= 8)
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return Math.min(entries * segments,
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(long) (entries + poorDistEntriesScale * 0.11 + segments * 8)); // 11% was min for tests
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return (long) (entries + poorDistEntriesScale * 0.11 + 80); // 11% was min for tests
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}
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@Override
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public B minSegments(int minSegments) {
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checkSegments(minSegments);
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this.minSegments = minSegments;
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return self();
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}
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int minSegments() {
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return Math.max(estimateSegments(), minSegments);
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}
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private int estimateSegments() {
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for (int power = 1; power < 64; power *= 2) {
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if (entries <= power * power * power)
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return power;
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}
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long size = entrySize * entries;
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if (size < 20L * 1000 * 1000) // 20 MB
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return 64;
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if (size < 200L * 1000 * 1000) // 200 MB
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return 128;
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if (size < 800L * 1000 * 1000) // 800 MB
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return 256;
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if (size < 2L * 1000 * 1000 * 1000) // 2 GB
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return 512;
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return 1024;
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}
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@Override
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public B actualSegments(int actualSegments) {
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checkSegments(actualSegments);
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this.actualSegments = actualSegments;
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return self();
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}
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int actualSegments() {
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if (actualSegments > 0)
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return actualSegments;
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long shortMMapSegments = trySegments(VanillaShortShortMultiMap.MAX_CAPACITY,
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MAX_SEGMENTS_TO_CHAISE_COMPACT_MULTI_MAPS);
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if (shortMMapSegments > 0L)
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return (int) shortMMapSegments;
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long intMMapSegments = trySegments(VanillaIntIntMultiMap.MAX_CAPACITY, MAX_SEGMENTS);
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if (intMMapSegments > 0L)
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return (int) intMMapSegments;
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throw new IllegalStateException("Max segments is " + MAX_SEGMENTS + ", configured so much" +
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" entries() that builder automatically decided to use " +
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(-intMMapSegments) + " segments");
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}
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private long trySegments(long maxSegmentCapacity, int maxSegments) {
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long segments = divideUpper(totalEntriesIfPoorDistribution(minSegments()),
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maxSegmentCapacity);
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segments = Maths.nextPower2(Math.max(segments, minSegments()), 1L);
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return segments <= maxSegments ? segments : -segments;
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}
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private boolean canSupportShortShort() {
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return entries > (long) minSegments() << 15;
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}
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public B lockTimeOut(long lockTimeOut, TimeUnit unit) {
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this.lockTimeOut = lockTimeOut;
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lockTimeOutUnit = unit;
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return self();
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}
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long lockTimeOut(TimeUnit unit) {
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return unit.convert(lockTimeOut, lockTimeOutUnit);
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}
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@Override
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public B errorListener(ChronicleHashErrorListener errorListener) {
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this.errorListener = errorListener;
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return self();
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}
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ChronicleHashErrorListener errorListener() {
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return errorListener;
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}
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/**
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* Configures if the maps created by this builder should return {@code null} instead of previous
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* mapped values on {@link ChronicleMap#put(Object, Object) ChornicleMap.put(key, value)}
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* calls.
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*
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* <p>{@link Map#put(Object, Object) Map.put()} returns the previous value, functionality which
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* is rarely used but fairly cheap for {@link HashMap}. In the case, for an off heap collection,
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* it has to create a new object and deserialize the data from off-heap memory. It's expensive
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* for something you probably don't use. </p> <p>By default, of cause, {@code ChronicleMap}
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* conforms the general {@code Map} contract and returns the previous mapped value on {@code
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* put()} calls. </p>
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*
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* @param putReturnsNull {@code true} if you want {@link ChronicleMap#put(Object, Object)
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* ChronicleMap.put()} to not return the value that was replaced but
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* instead return {@code null}
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* @return an instance of the map builder back
|
|
* @see #removeReturnsNull(boolean)
|
|
*/
|
|
public B putReturnsNull(boolean putReturnsNull) {
|
|
this.putReturnsNull = putReturnsNull;
|
|
return self();
|
|
}
|
|
|
|
boolean putReturnsNull() {
|
|
return putReturnsNull;
|
|
}
|
|
|
|
/**
|
|
* Configures if the maps created by this builder should return {@code null} instead of the last
|
|
* mapped value on {@link ChronicleMap#remove(Object) ChronicleMap.remove(key)} calls.
|
|
*
|
|
* <p>{@link Map#remove(Object) Map.remove()} returns the previous value, functionality which is
|
|
* rarely used but fairly cheap for {@link HashMap}. In the case, for an off heap collection, it
|
|
* has to create a new object and deserialize the data from off-heap memory. It's expensive for
|
|
* something you probably don't use. </p>
|
|
*
|
|
* @param removeReturnsNull {@code true} if you want {@link ChronicleMap#remove(Object)
|
|
* ChronicleMap.remove()} to not return the value of the removed entry
|
|
* but instead return {@code null}
|
|
* @return an instance of the map builder back
|
|
* @see #putReturnsNull(boolean)
|
|
*/
|
|
public B removeReturnsNull(boolean removeReturnsNull) {
|
|
this.removeReturnsNull = removeReturnsNull;
|
|
return self();
|
|
}
|
|
|
|
boolean removeReturnsNull() {
|
|
return removeReturnsNull;
|
|
}
|
|
|
|
@Override
|
|
public B metaDataBytes(int metaDataBytes) {
|
|
if ((metaDataBytes & 0xFF) != metaDataBytes)
|
|
throw new IllegalArgumentException("MetaDataBytes must be [0..255] was " + metaDataBytes);
|
|
this.metaDataBytes = metaDataBytes;
|
|
return self();
|
|
}
|
|
|
|
int metaDataBytes() {
|
|
return metaDataBytes;
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "ChronicleMapBuilder{" +
|
|
"actualSegments=" + pretty(actualSegments) +
|
|
", minSegments=" + pretty(minSegments) +
|
|
", actualEntriesPerSegment=" + pretty(actualEntriesPerSegment) +
|
|
", keySize=" + pretty(keySize) +
|
|
", sampleKeyForConstantSizeComputation=" + pretty(sampleKey) +
|
|
", valueSize=" + pretty(valueSize) +
|
|
", sampleValueForConstantSizeComputation=" + pretty(sampleValue) +
|
|
", entrySize=" + pretty(entrySize) +
|
|
", entryAndValueAlignment=" + entryAndValueAlignment() +
|
|
", entries=" + entries() +
|
|
", lockTimeOut=" + lockTimeOut + " " + lockTimeOutUnit +
|
|
", metaDataBytes=" + metaDataBytes() +
|
|
", errorListener=" + errorListener() +
|
|
", putReturnsNull=" + putReturnsNull() +
|
|
", removeReturnsNull=" + removeReturnsNull() +
|
|
", timeProvider=" + timeProvider() +
|
|
", bytesMarshallerFactory=" + pretty(bytesMarshallerFactory) +
|
|
", objectSerializer=" + pretty(objectSerializer) +
|
|
", keyBuilder=" + keyBuilder +
|
|
", valueBuilder=" + valueBuilder +
|
|
", eventListener=" + eventListener +
|
|
", defaultValue=" + defaultValue +
|
|
", defaultValueProvider=" + pretty(defaultValueProvider) +
|
|
", prepareValueBytes=" + pretty(prepareValueBytes) +
|
|
'}';
|
|
}
|
|
|
|
@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
|
|
@Override
|
|
public boolean equals(Object o) {
|
|
return builderEquals(this, o);
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
return toString().hashCode();
|
|
}
|
|
|
|
@Override
|
|
public B timeProvider(TimeProvider timeProvider) {
|
|
this.timeProvider = timeProvider;
|
|
return self();
|
|
}
|
|
|
|
TimeProvider timeProvider() {
|
|
return timeProvider;
|
|
}
|
|
|
|
BytesMarshallerFactory bytesMarshallerFactory() {
|
|
return bytesMarshallerFactory == null ?
|
|
bytesMarshallerFactory = new VanillaBytesMarshallerFactory() :
|
|
bytesMarshallerFactory;
|
|
}
|
|
|
|
@Override
|
|
public B bytesMarshallerFactory(BytesMarshallerFactory bytesMarshallerFactory) {
|
|
this.bytesMarshallerFactory = bytesMarshallerFactory;
|
|
return self();
|
|
}
|
|
|
|
ObjectSerializer objectSerializer() {
|
|
return objectSerializer == null ?
|
|
objectSerializer = BytesMarshallableSerializer.create(
|
|
bytesMarshallerFactory(), JDKObjectSerializer.INSTANCE) :
|
|
objectSerializer;
|
|
}
|
|
|
|
@Override
|
|
public B objectSerializer(ObjectSerializer objectSerializer) {
|
|
this.objectSerializer = objectSerializer;
|
|
return self();
|
|
}
|
|
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*
|
|
* <p>Example:
|
|
*/
|
|
@Override
|
|
public B keyMarshaller(@NotNull BytesMarshaller<K> keyMarshaller) {
|
|
keyBuilder.marshaller(keyMarshaller);
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public B keyMarshallers(@NotNull BytesWriter<K> keyWriter, @NotNull BytesReader<K> keyReader) {
|
|
keyBuilder.writer(keyWriter);
|
|
keyBuilder.reader(keyReader);
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public B keySizeMarshaller(@NotNull SizeMarshaller keySizeMarshaller) {
|
|
keyBuilder.sizeMarshaller(keySizeMarshaller);
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public B keyDeserializationFactory(@NotNull ObjectFactory<K> keyDeserializationFactory) {
|
|
keyBuilder.factory(keyDeserializationFactory);
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public B immutableKeys() {
|
|
keyBuilder.instancesAreMutable(false);
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public StatelessClientConfig<ChronicleMap<K, V>> statelessClient(
|
|
InetSocketAddress remoteAddress) {
|
|
return new StatelessMapConfig<>(this.clone(), remoteAddress);
|
|
}
|
|
|
|
/**
|
|
* Configures factory which is used to create a new value instance, if value class is either
|
|
* {@link Byteable}, {@link BytesMarshallable} or {@link Externalizable} subclass in maps,
|
|
* created by this builder.
|
|
*
|
|
* <p>Default value deserialization factory is {@link NewInstanceObjectFactory}, which creates a
|
|
* new value instance using {@link Class#newInstance()} default constructor. You could provide
|
|
* an {@link AllocateInstanceObjectFactory}, which uses {@code Unsafe.allocateInstance(Class)}
|
|
* (you might want to do this for better performance or if you don't want to initialize fields),
|
|
* or a factory which calls a value class constructor with some arguments, or a factory which
|
|
* internally delegates to instance pool or {@link ThreadLocal}, to reduce allocations. </p>
|
|
*
|
|
* @param valueDeserializationFactory the value factory used to produce instances to deserialize
|
|
* data in
|
|
* @return this builder back
|
|
*/
|
|
public B valueDeserializationFactory(@NotNull ObjectFactory<V> valueDeserializationFactory) {
|
|
valueBuilder.factory(valueDeserializationFactory);
|
|
return self();
|
|
}
|
|
|
|
public B eventListener(MapEventListener<K, V, ChronicleMap<K, V>> eventListener) {
|
|
this.eventListener = eventListener;
|
|
return self();
|
|
}
|
|
|
|
MapEventListener<K, V, ChronicleMap<K, V>> eventListener() {
|
|
return eventListener;
|
|
}
|
|
|
|
/**
|
|
* Specifies the value to be put for each key queried in {@link ChronicleMap#acquireUsing
|
|
* acquireUsing()} method, if the key is absent in the map, created by this builder.
|
|
*
|
|
* <p>This configuration overrides any previous {@link #defaultValueProvider(DefaultValueProvider)}
|
|
* configuration to this {@code AbstractChronicleMapBuilder}. </p>
|
|
*
|
|
* @param defaultValue the default value to be put to the map for absent keys during {@code
|
|
* acquireUsing()} calls
|
|
* @return this builder object back
|
|
*/
|
|
public B defaultValue(V defaultValue) {
|
|
this.defaultValue = defaultValue;
|
|
this.defaultValueProvider = null;
|
|
if (defaultValue == null)
|
|
defaultValueProvider = NullValueProvider.INSTANCE;
|
|
this.prepareValueBytes = null;
|
|
return self();
|
|
}
|
|
|
|
/**
|
|
* Specifies the function to obtain a value for the key during {@link ChronicleMap#acquireUsing
|
|
* acquireUsing()} calls, if the key is absent in the map, created by this builder.
|
|
*
|
|
* <p>This configuration overrides any previous {@link #defaultValue(Object)} configuration to
|
|
* this {@code AbstractChronicleMapBuilder}. </p>
|
|
*
|
|
* @param defaultValueProvider the strategy to obtain a default value by the absent key
|
|
* @return this builder object back
|
|
*/
|
|
public B defaultValueProvider(
|
|
@NotNull DefaultValueProvider<K, V> defaultValueProvider) {
|
|
this.defaultValueProvider = defaultValueProvider;
|
|
this.defaultValue = null;
|
|
this.prepareValueBytes = null;
|
|
return self();
|
|
}
|
|
|
|
B prepareValueBytesOnAcquire(@NotNull PrepareValueBytes<K, V> prepareValueBytes) {
|
|
this.prepareValueBytes = prepareValueBytes;
|
|
this.defaultValue = null;
|
|
this.defaultValueProvider = null;
|
|
return self();
|
|
}
|
|
|
|
PrepareValueBytesAsWriter<K> prepareValueBytesAsWriter() {
|
|
return new PrepareValueBytesAsWriter<>(prepareValueBytes, valueSize());
|
|
}
|
|
|
|
|
|
/**
|
|
* Non-public because should be called only after {@link #preMapConstruction(boolean)}
|
|
*/
|
|
DefaultValueProvider<K, V> defaultValueProvider() {
|
|
if (defaultValueProvider != null)
|
|
return defaultValueProvider;
|
|
if (defaultValue == null)
|
|
return null;
|
|
Object originalValueWriter = valueBuilder.interop();
|
|
Provider writerProvider = Provider.of(originalValueWriter.getClass());
|
|
ThreadLocalCopies copies = writerProvider.getCopies(null);
|
|
Object valueWriter = writerProvider.get(copies, originalValueWriter);
|
|
MetaProvider metaWriterProvider = valueBuilder.metaInteropProvider();
|
|
copies = metaWriterProvider.getCopies(copies);
|
|
MetaBytesWriter metaValueWriter = metaWriterProvider.get(copies,
|
|
valueBuilder.metaInterop(), valueWriter, defaultValue);
|
|
return new ConstantValueProvider<K, V>(defaultValue, metaValueWriter, valueWriter);
|
|
}
|
|
|
|
@Override
|
|
public B replication(SimpleReplication replication) {
|
|
this.simpleReplication = replication;
|
|
return self();
|
|
}
|
|
|
|
@Override
|
|
public B replication(byte identifier, TcpConfig tcpTransportAndNetwork) {
|
|
return replication(SimpleReplication.builder()
|
|
.tcpTransportAndNetwork(tcpTransportAndNetwork).create(identifier));
|
|
}
|
|
|
|
@Override
|
|
public ChronicleHashInstanceConfig<ChronicleMap<K, V>> instance() {
|
|
return new InstanceConfig<>(this.clone(), simpleReplication, null, null);
|
|
}
|
|
|
|
@Override
|
|
public ChronicleMap<K, V> createPersistedTo(File file) throws IOException {
|
|
return createWithFile(file, simpleReplication, null);
|
|
}
|
|
|
|
@Override
|
|
public ChronicleMap<K, V> create() throws IOException {
|
|
return createWithoutFile(simpleReplication, null);
|
|
}
|
|
|
|
ChronicleMap<K, V> create(InstanceConfig<K, V> ib) throws IOException {
|
|
if (ib.file != null) {
|
|
return createWithFile(ib.file, ib.simpleReplication, ib.channel);
|
|
} else {
|
|
return createWithoutFile(ib.simpleReplication, ib.channel);
|
|
}
|
|
}
|
|
|
|
ChronicleMap<K, V> createWithFile(File file, SimpleReplication simpleReplication,
|
|
ReplicationChannel channel) throws IOException {
|
|
for (int i = 0; i < 10; i++) {
|
|
if (file.exists() && file.length() > 0) {
|
|
FileInputStream fis = new FileInputStream(file);
|
|
ObjectInputStream ois = new ObjectInputStream(fis);
|
|
try {
|
|
VanillaChronicleMap<K, ?, ?, V, ?, ?> map =
|
|
(VanillaChronicleMap<K, ?, ?, V, ?, ?>) ois.readObject();
|
|
map.headerSize = roundUpMapHeaderSize(fis.getChannel().position());
|
|
map.createMappedStoreAndSegments(file);
|
|
return establishReplication(map, simpleReplication, channel);
|
|
} catch (ClassNotFoundException e) {
|
|
throw new IOException(e);
|
|
} finally {
|
|
ois.close();
|
|
}
|
|
}
|
|
if (file.createNewFile() || file.length() == 0) {
|
|
break;
|
|
}
|
|
try {
|
|
Thread.sleep(100);
|
|
} catch (InterruptedException e) {
|
|
throw new IOException(e);
|
|
}
|
|
}
|
|
// new file
|
|
if (!file.exists())
|
|
throw new FileNotFoundException("Unable to create " + file);
|
|
|
|
VanillaChronicleMap<K, ?, ?, V, ?, ?> map = newMap(simpleReplication, channel);
|
|
|
|
FileOutputStream fos = new FileOutputStream(file);
|
|
ObjectOutputStream oos = new ObjectOutputStream(fos);
|
|
try {
|
|
oos.writeObject(map);
|
|
oos.flush();
|
|
map.headerSize = roundUpMapHeaderSize(fos.getChannel().position());
|
|
map.createMappedStoreAndSegments(file);
|
|
} finally {
|
|
oos.close();
|
|
}
|
|
|
|
return establishReplication(map, simpleReplication, channel);
|
|
}
|
|
|
|
/**
|
|
* Only for testing.
|
|
*
|
|
* @param identifier id
|
|
* @return map
|
|
*/
|
|
ChronicleMap<K, V> createReplicated(byte identifier) throws IOException {
|
|
VanillaChronicleMap<K, ?, ?, V, ?, ?> map =
|
|
new ReplicatedChronicleMap<K, Object, MetaBytesInterop<K, Object>,
|
|
V, Object, MetaBytesWriter<V, Object>>(this, identifier);
|
|
BytesStore bytesStore = new DirectStore(JDKObjectSerializer.INSTANCE,
|
|
map.sizeInBytes(), true);
|
|
map.createMappedStoreAndSegments(bytesStore);
|
|
return map;
|
|
}
|
|
|
|
private ChronicleMap<K, V> createWithoutFile(
|
|
SimpleReplication simpleReplication, ReplicationChannel channel) throws IOException {
|
|
VanillaChronicleMap<K, ?, ?, V, ?, ?> map = newMap(simpleReplication, channel);
|
|
BytesStore bytesStore = new DirectStore(JDKObjectSerializer.INSTANCE,
|
|
map.sizeInBytes(), true);
|
|
map.createMappedStoreAndSegments(bytesStore);
|
|
return establishReplication(map, simpleReplication, channel);
|
|
}
|
|
|
|
ChronicleMap<K, V> createStatelessMap(StatelessMapConfig<K, V> statelessBuilder)
|
|
throws IOException {
|
|
preMapConstruction(false);
|
|
return new StatelessChronicleMap<K, V>(
|
|
statelessBuilder,
|
|
this);
|
|
}
|
|
|
|
private VanillaChronicleMap<K, ?, ?, V, ?, ?> newMap(
|
|
SimpleReplication simpleReplication, ReplicationChannel channel) throws IOException {
|
|
boolean replicated = simpleReplication != null || channel != null;
|
|
preMapConstruction(replicated);
|
|
if (replicated) {
|
|
byte identifier;
|
|
if (simpleReplication != null) {
|
|
identifier = simpleReplication.identifier();
|
|
} else {
|
|
identifier = channel.hub().identifier();
|
|
}
|
|
return new ReplicatedChronicleMap<K, Object, MetaBytesInterop<K, Object>,
|
|
V, Object, MetaBytesWriter<V, Object>>(this, identifier);
|
|
} else {
|
|
return new VanillaChronicleMap<K, Object, MetaBytesInterop<K, Object>,
|
|
V, Object, MetaBytesWriter<V, Object>>(this);
|
|
}
|
|
}
|
|
|
|
void preMapConstruction(boolean replicated) {
|
|
keyBuilder.objectSerializer(objectSerializer());
|
|
valueBuilder.objectSerializer(objectSerializer());
|
|
|
|
long maxSize = (long) entrySize(replicated) * figureBufferAllocationFactor();
|
|
keyBuilder.maxSize(maxSize);
|
|
valueBuilder.maxSize(maxSize);
|
|
|
|
if (sampleKey != null)
|
|
keyBuilder.constantSizeBySample(sampleKey);
|
|
if (sampleValue != null)
|
|
valueBuilder.constantSizeBySample(sampleValue);
|
|
}
|
|
|
|
private ChronicleMap<K, V> establishReplication(
|
|
VanillaChronicleMap<K, ?, ?, V, ?, ?> map, SimpleReplication simpleReplication,
|
|
ReplicationChannel channel) throws IOException {
|
|
if (map instanceof ReplicatedChronicleMap) {
|
|
if (simpleReplication != null && channel != null) {
|
|
throw new AssertionError("Only one non-null replication should be passed");
|
|
}
|
|
ReplicatedChronicleMap result = (ReplicatedChronicleMap) map;
|
|
List<Replicator> replicators = new ArrayList<>(2);
|
|
if (simpleReplication != null) {
|
|
if (simpleReplication.tcpTransportAndNetwork() != null)
|
|
replicators.add(Replicators.tcp(simpleReplication.tcpTransportAndNetwork()));
|
|
if (simpleReplication.udpTransport() != null)
|
|
replicators.add(Replicators.udp(simpleReplication.udpTransport()));
|
|
} else {
|
|
ReplicationHub hub = channel.hub();
|
|
int entrySize = entrySize(true);
|
|
if (entrySize > hub.maxEntrySize()) {
|
|
throw new IllegalArgumentException("During ChannelProviderBuilder setup, " +
|
|
"maxEntrySize=" + hub.maxEntrySize() +
|
|
" was specified, but map with " +
|
|
"entrySize=" + entrySize + " is attempted to apply to the replicator");
|
|
}
|
|
ChannelProvider provider = ChannelProvider.getProvider(hub);
|
|
ChannelProvider.ChronicleChannel ch = provider.createChannel(channel.channelId());
|
|
replicators.add(ch);
|
|
}
|
|
for (Replicator replicator : replicators) {
|
|
Closeable token = replicator.applyTo(this, result, result, map);
|
|
if (replicators.size() == 1 && token.getClass() == UdpReplicator.class) {
|
|
LOG.warn(Replicators.ONLY_UDP_WARN_MESSAGE);
|
|
}
|
|
result.addCloseable(token);
|
|
}
|
|
}
|
|
return map;
|
|
}
|
|
|
|
private int figureBufferAllocationFactor() {
|
|
// if expected map size is about 1000, seems rather wasteful to allocate
|
|
// key and value serialization buffers each x64 of expected entry size..
|
|
return (int) Math.min(Math.max(2L, entries() >> 10),
|
|
VanillaChronicleMap.MAX_ENTRY_OVERSIZE_FACTOR);
|
|
}
|
|
|
|
int segmentHeaderSize() {
|
|
int segments = actualSegments();
|
|
// reduce false sharing unless we have a lot of segments.
|
|
return segments <= 8192 ? 64 : 16;
|
|
}
|
|
}
|
|
|