--- /dev/null
+/*
+ * 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.
+ *
+ * @author Erik Brakkee
+ */
+public interface Lock {
+
+ /**
+ * Acquires the lock.
+ */
+ void acquire();
+
+ /**
+ * Releases the lock.
+ */
+ void release();
+}