initial version of support project with build support.

[utils] / src / org / wamblee / concurrency / Lock.java

diff --git a/src/org/wamblee/concurrency/Lock.java b/src/org/wamblee/concurrency/Lock.java
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+/*
+ * Copyright 2005 the original author or authors.
+ * 
+ * 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 org.wamblee.concurrency;
+
+/**
+ * Represents a re-entrant lock. 
+ * Implementations can provide inmemory JVM locking or full cluster safe locking 
+ * mechanisms.  
+ */
+public interface Lock {
+ 
+    /**
+     * Acquires the lock. 
+     */
+    void acquire(); 
+    
+    /**
+     * Releases the lock. 
+     */
+    void release(); 
+}
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