Add file locking, work on #229

src/main/java/net/openhft/chronicle/hash/ChronicleFileLockException.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2012-2018 Chronicle Map Contributors
+ *
+ * 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.hash;
+
+/**
+ * This exception is thrown, when a Chronicle Hash cannot acquire a required file lock.
+ *
+ */
+public final class ChronicleFileLockException extends RuntimeException {
+    private static final long serialVersionUID = -2034623786298623984L;
+
+    /**
+     * Constructs a new {@code ChronicleHashLockException} with the specified cause.
+     *
+     * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method)
+     */
+    public ChronicleFileLockException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Constructs a new {@code ChronicleHashLockException} with the specified detail
+     * message.
+     *
+     * @param message the detail message. The detail message is saved for later retrieval by the
+     *                {@link #getMessage()} method.
+     */
+    public ChronicleFileLockException(String message) {
+        super(message);
+    }
+
+    public ChronicleFileLockException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}