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Groovy example source code file (SynchronizedTransformTest.groovy)

This example Groovy source code file (SynchronizedTransformTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

count, count, countdownlatch, countdownlatch, groovytestcase, groovytestcase, synchronizedtransformtest, synchronizedtransformtest, threading, threads

The Groovy SynchronizedTransformTest.groovy source code

/*
 * Copyright 2008-2010 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.codehaus.groovy.transform

import java.util.concurrent.TimeUnit
import java.util.concurrent.CountDownLatch

/**
 * @author Paul King
 * @author Hamlet D'Arcy
 */
class SynchronizedTransformTest extends GroovyTestCase {

    def countReadyLatch = new CountDownLatch(1);
    def testReadyLatch = new CountDownLatch(1);

    void testSynchronized() {
        def c = new Count()
        Thread.start{
            c.incDec()
        }
        testReadyLatch.countDown()
        countReadyLatch.await(5, TimeUnit.SECONDS)
        c.incDec()
    }

    class Count {
      private val = 0
      @groovy.transform.Synchronized
      void incDec() {
        assert val == 0; val++; assert val == 1
        countReadyLatch.countDown()
        testReadyLatch.await(5, TimeUnit.SECONDS)
        assert val == 1; val--; assert val == 0
      }
    }
}

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