org.apache.tez.common.TestRPCUtil.java Source code

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Here is the source code for org.apache.tez.common.TestRPCUtil.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.tez.common;

import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.tez.dag.api.SessionNotRunning;
import org.apache.tez.dag.api.TezException;
import org.junit.Assert;

import org.apache.hadoop.ipc.RemoteException;
import org.junit.Test;

import com.google.protobuf.ServiceException;

public class TestRPCUtil {

    @Test(timeout = 1000)
    public void testUnknownExceptionUnwrapping() {
        Class<? extends Throwable> exception = TezException.class;
        String className = "UnknownException.class";
        verifyRemoteExceptionUnwrapping(exception, className);
    }

    @Test
    public void testRemoteIOExceptionUnwrapping() {
        Class<? extends Throwable> exception = IOException.class;
        verifyRemoteExceptionUnwrapping(exception, exception.getName());
    }

    @Test
    public void testRemoteIOExceptionDerivativeUnwrapping() {
        // Test IOException sub-class
        Class<? extends Throwable> exception = FileNotFoundException.class;
        verifyRemoteExceptionUnwrapping(exception, exception.getName());
    }

    @Test
    public void testRemoteTezExceptionUnwrapping() {
        Class<? extends Throwable> exception = TezException.class;
        verifyRemoteExceptionUnwrapping(exception, exception.getName());

    }

    @Test
    public void testRemoteTezExceptionDerivativeUnwrapping() {
        Class<? extends Throwable> exception = SessionNotRunning.class;
        verifyRemoteExceptionUnwrapping(exception, exception.getName());
    }

    @Test
    public void testRemoteRuntimeExceptionUnwrapping() {
        Class<? extends Throwable> exception = NullPointerException.class;
        verifyRemoteExceptionUnwrapping(exception, exception.getName());
    }

    @Test
    public void testUnexpectedRemoteExceptionUnwrapping() {
        // Non IOException, TezException thrown by the remote side.
        Class<? extends Throwable> exception = Exception.class;
        verifyRemoteExceptionUnwrapping(RemoteException.class, exception.getName());
    }

    @Test
    public void testRemoteTezExceptionWithoutStringConstructor() {
        // Derivatives of TezException should always define a string constructor.
        Class<? extends Throwable> exception = TezTestExceptionNoConstructor.class;
        verifyRemoteExceptionUnwrapping(RemoteException.class, exception.getName());
    }

    @Test
    public void testRPCServiceExceptionUnwrapping() {
        String message = "ServiceExceptionMessage";
        ServiceException se = new ServiceException(message);

        Throwable t = null;
        try {
            RPCUtil.unwrapAndThrowException(se);
        } catch (Throwable thrown) {
            t = thrown;
        }

        Assert.assertTrue(IOException.class.isInstance(t));
        Assert.assertTrue(t.getMessage().contains(message));
    }

    @Test
    public void testRPCIOExceptionUnwrapping() {
        String message = "DirectIOExceptionMessage";
        IOException ioException = new FileNotFoundException(message);
        ServiceException se = new ServiceException(ioException);

        Throwable t = null;
        try {
            RPCUtil.unwrapAndThrowException(se);
        } catch (Throwable thrown) {
            t = thrown;
        }
        Assert.assertTrue(FileNotFoundException.class.isInstance(t));
        Assert.assertTrue(t.getMessage().contains(message));
    }

    @Test
    public void testRPCRuntimeExceptionUnwrapping() {
        String message = "RPCRuntimeExceptionUnwrapping";
        RuntimeException re = new NullPointerException(message);
        ServiceException se = new ServiceException(re);

        Throwable t = null;
        try {
            RPCUtil.unwrapAndThrowException(se);
        } catch (Throwable thrown) {
            t = thrown;
        }

        Assert.assertTrue(NullPointerException.class.isInstance(t));
        Assert.assertTrue(t.getMessage().contains(message));
    }

    private void verifyRemoteExceptionUnwrapping(Class<? extends Throwable> expectedLocalException,
            String realExceptionClassName) {
        verifyRemoteExceptionUnwrapping(expectedLocalException, realExceptionClassName, true);
    }

    private void verifyRemoteExceptionUnwrapping(Class<? extends Throwable> expectedLocalException,
            String realExceptionClassName, boolean allowIO) {
        String message = realExceptionClassName + "Message";
        RemoteException re = new RemoteException(realExceptionClassName, message);
        ServiceException se = new ServiceException(re);

        Throwable t = null;
        try {
            if (allowIO) {
                RPCUtil.unwrapAndThrowException(se);
            } else {
                RPCUtil.unwrapAndThrowNonIOException(se);
            }
        } catch (Throwable thrown) {
            t = thrown;
        }

        Assert.assertTrue("Expected exception [" + expectedLocalException + "] but found " + t,
                expectedLocalException.isInstance(t));
        Assert.assertTrue("Expected message [" + message + "] but found " + t.getMessage(),
                t.getMessage().contains(message));
    }

    @Test(timeout = 1000)
    public void testRemoteNonIOExceptionUnwrapping() {
        Class<? extends Throwable> exception = TezException.class;
        verifyRemoteExceptionUnwrapping(exception, IOException.class.getName(), false);
    }

    private static class TezTestExceptionNoConstructor extends Exception {
        private static final long serialVersionUID = 1L;
    }

}