Package com.splunk.shuttl.archiver.bucketlock

Source Code of com.splunk.shuttl.archiver.bucketlock.BucketLockerTest

// 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;
    }
  }
}
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