org.apache.hadoop.hbase.errorhandling.TestTimeoutExceptionInjector.java Source code

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Here is the source code for org.apache.hadoop.hbase.errorhandling.TestTimeoutExceptionInjector.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.hadoop.hbase.errorhandling;

import static org.junit.Assert.fail;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.SmallTests;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;

/**
 * Test the {@link TimeoutExceptionInjector} to ensure we fulfill contracts
 */
@Category(SmallTests.class)
public class TestTimeoutExceptionInjector {

    private static final Log LOG = LogFactory.getLog(TestTimeoutExceptionInjector.class);

    /**
     * Test that a manually triggered timer fires an exception.
     */
    @Test(timeout = 60000)
    public void testTimerTrigger() {
        final long time = 10000000; // pick a value that is very far in the future
        ForeignExceptionListener listener = Mockito.mock(ForeignExceptionListener.class);
        TimeoutExceptionInjector timer = new TimeoutExceptionInjector(listener, time);
        timer.start();
        timer.trigger();
        Mockito.verify(listener, Mockito.times(1)).receive(Mockito.any(ForeignException.class));
    }

    /**
     * Test that a manually triggered exception with data fires with the data in receiveError.
     */
    @Test
    public void testTimerPassesOnErrorInfo() {
        final long time = 1000000;
        ForeignExceptionListener listener = Mockito.mock(ForeignExceptionListener.class);
        TimeoutExceptionInjector timer = new TimeoutExceptionInjector(listener, time);
        timer.start();
        timer.trigger();
        Mockito.verify(listener).receive(Mockito.any(ForeignException.class));
    }

    /**
     * Demonstrate TimeoutExceptionInjector semantics -- completion means no more exceptions passed to
     * error listener.
     */
    @Test(timeout = 60000)
    public void testStartAfterComplete() throws InterruptedException {
        final long time = 10;
        ForeignExceptionListener listener = Mockito.mock(ForeignExceptionListener.class);
        TimeoutExceptionInjector timer = new TimeoutExceptionInjector(listener, time);
        timer.complete();
        try {
            timer.start();
            fail("Timer should fail to start after complete.");
        } catch (IllegalStateException e) {
            LOG.debug("Correctly failed timer: " + e.getMessage());
        }
        Thread.sleep(time + 1);
        Mockito.verifyZeroInteractions(listener);
    }

    /**
     * Demonstrate TimeoutExceptionInjector semantics -- triggering fires exception and completes
     * the timer.
     */
    @Test(timeout = 60000)
    public void testStartAfterTrigger() throws InterruptedException {
        final long time = 10;
        ForeignExceptionListener listener = Mockito.mock(ForeignExceptionListener.class);
        TimeoutExceptionInjector timer = new TimeoutExceptionInjector(listener, time);
        timer.trigger();
        try {
            timer.start();
            fail("Timer should fail to start after complete.");
        } catch (IllegalStateException e) {
            LOG.debug("Correctly failed timer: " + e.getMessage());
        }
        Thread.sleep(time * 2);
        Mockito.verify(listener, Mockito.times(1)).receive(Mockito.any(ForeignException.class));
        Mockito.verifyNoMoreInteractions(listener);
    }
}