HCOLL-134 reduced the number of entries as this is causing a memory issue on my laptop

src/main/java/net/openhft/chronicle/map/ReplicationHubFindByName.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2014 Higher Frequency Trading http://www.higherfrequencytrading.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.openhft.chronicle.map;
+
+import net.openhft.chronicle.hash.ChronicleHash;
+import net.openhft.chronicle.hash.ChronicleHashInstanceConfig;
+import net.openhft.chronicle.hash.FindByName;
+import net.openhft.chronicle.hash.replication.ReplicationHub;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static net.openhft.chronicle.map.ChronicleMapBuilder.of;
+
+/**
+ * @author Rob Austin.
+ */
+class ReplicationHubFindByName implements FindByName {
+
+    public static final int MAP_BY_NAME_CHANNEL = 1;
+    private final ReplicationHub replicationHub;
+    int maxEntrySize = 10 * 1024;
+
+    private final AtomicInteger nextFreeChannel = new AtomicInteger(1);
+    private final Map<String, ChronicleMapBuilder> map;
+
+    /**
+     * @throws IOException
+     */
+    public ReplicationHubFindByName(ReplicationHub replicationHub) throws IOException {
+        this.replicationHub = replicationHub;
+        this.map = (Map) of(CharSequence.class, ChronicleMapBuilder.class)
+                .entrySize(300)
+                .entries(128)
+                .instance()
+                .replicatedViaChannel(replicationHub.createChannel((short) MAP_BY_NAME_CHANNEL)).create();
+    }
+
+    ChronicleMapBuilder get(String name) throws IllegalArgumentException {
+
+        ChronicleMapBuilder chronicleMapBuilder = map.get(name);
+        if (chronicleMapBuilder == null)
+            throw new IllegalArgumentException("A map name=" + name + " can not be found.");
+
+        return chronicleMapBuilder;
+    }
+
+
+    public <T extends ChronicleHash> T create(String name) throws IllegalArgumentException,
+            IOException {
+        return (T) replicatedViaChannel(name).create();
+    }
+
+    private ChronicleHashInstanceConfig replicatedViaChannel(String name) {
+        return toReplicatedViaChannel(get(name));
+    }
+
+    /**
+     * similar to {@link  ChronicleMapBuilder#createPersistedTo(File file)  }
+     *
+     * @param name the name of the map to be created
+     * @param file the file which will be used as shared off heap storage
+     * @param <T>
+     * @return a new instance of ChronicleMap
+     * @throws IllegalArgumentException
+     * @throws IOException
+     * @see ChronicleMapBuilder#createPersistedTo(File file)
+     */
+    public <T extends ChronicleHash> T createPersistedTo(String name, File file) throws IllegalArgumentException,
+            IOException {
+        return (T) replicatedViaChannel(name).persistedTo(file).create();
+    }
+
+    private ChronicleHashInstanceConfig toReplicatedViaChannel(ChronicleMapBuilder builder) {
+        int channelId = nextFreeChannel.incrementAndGet();
+        if (channelId > replicationHub.maxNumberOfChannels())
+            throw new IllegalStateException("There are no more free channels, you can increase the number " +
+                    "of changes in the replicationHub by calling replicationHub.maxNumberOfChannels(..);");
+        return builder.instance().replicatedViaChannel(replicationHub.createChannel((short) channelId));
+    }
+
+    public void add(ChronicleMapBuilder builder) {
+        this.map.put(builder.name(), builder);
+    }
+}