com.splunk.shuttl.archiver.bucketlock.BucketLockerTest.java Source code

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Here is the source code for com.splunk.shuttl.archiver.bucketlock.BucketLockerTest.java

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// Copyright (C) 2011 Splunk Inc.
//
// Splunk Inc. licenses this file
// to you 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 com.splunk.shuttl.archiver.bucketlock;

import static com.splunk.shuttl.testutil.TUtilsFile.*;
import static org.mockito.Mockito.*;
import static org.testng.AssertJUnit.*;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

import com.splunk.shuttl.archiver.bucketlock.BucketLocker.SharedLockBucketHandler;
import com.splunk.shuttl.archiver.model.Bucket;
import com.splunk.shuttl.testutil.TUtilsBucket;

@Test(groups = { "fast-unit" })
public class BucketLockerTest {

    File tempTestDirectory;
    Bucket bucket;
    BucketLocker bucketLocker;

    @BeforeMethod
    public void setUp() {
        tempTestDirectory = createDirectory();
        bucket = TUtilsBucket.createBucketInDirectory(tempTestDirectory);
        bucketLocker = new BucketLocker() {

            @Override
            public BucketLock getLockForBucket(Bucket bucket) {
                return new BucketLock(bucket, tempTestDirectory);
            }
        };
    }

    @AfterMethod
    public void tearDown() throws IOException {
        FileUtils.deleteDirectory(tempTestDirectory);
    }

    @Test(groups = { "fast-unit" })
    public void callBucketHandlerUnderSharedLock_givenBucketThatCanBeLocked_executesRunnable() {
        NoOpBucketHandler bucketHandler = new NoOpBucketHandler();
        bucketLocker.callBucketHandlerUnderSharedLock(bucket, bucketHandler);
        assertTrue(bucketHandler.wasRun);
        assertFalse(bucketHandler.wasLocked);
    }

    public void callBucketHandlerUnderSharedLock_givenLockedBucket_doesNotExecuteRunnable() {
        BucketLock bucketLock = bucketLocker.getLockForBucket(bucket);
        assertTrue(bucketLock.tryLockExclusive());
        NoOpBucketHandler bucketHandler = new NoOpBucketHandler();
        bucketLocker.callBucketHandlerUnderSharedLock(bucket, bucketHandler);
        assertFalse(bucketHandler.wasRun);
        assertTrue(bucketHandler.wasLocked);
    }

    public void callBucketHandlerUnderSharedLock_runOnceAlreadyAndReleasedTheLock_executesRunnableAgain() {
        NoOpBucketHandler firstHandler = new NoOpBucketHandler();
        NoOpBucketHandler secondHandler = new NoOpBucketHandler();
        bucketLocker.callBucketHandlerUnderSharedLock(bucket, firstHandler);
        bucketLocker.callBucketHandlerUnderSharedLock(bucket, secondHandler);
        assertTrue(firstHandler.wasRun);
        assertTrue(secondHandler.wasRun);
    }

    public void callBucketHandlerUnderSharedLock_givenLockedBucketHandler_callsBucketHandlerToHandleTheBucket() {
        SharedLockBucketHandler bucketHandler = mock(SharedLockBucketHandler.class);
        bucketLocker.callBucketHandlerUnderSharedLock(bucket, bucketHandler);
        verify(bucketHandler).handleSharedLockedBucket(bucket);
    }

    public static class NoOpBucketHandler implements SharedLockBucketHandler {

        public boolean wasRun = false;
        public boolean wasLocked = false;

        @Override
        public void handleSharedLockedBucket(Bucket bucket) {
            wasRun = true;
        }

        @Override
        public void bucketWasLocked(Bucket bucket) {
            wasLocked = true;
        }
    }
}