Source code

001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.runtime.common.launch;
020
021import com.google.protobuf.ByteString;
022import org.apache.reef.proto.ReefServiceProtos;
023import org.apache.reef.runtime.common.launch.parameters.ErrorHandlerRID;
024import org.apache.reef.runtime.common.launch.parameters.LaunchID;
025import org.apache.reef.runtime.common.utils.ExceptionCodec;
026import org.apache.reef.runtime.common.utils.RemoteManager;
027import org.apache.reef.tang.InjectionFuture;
028import org.apache.reef.tang.annotations.Parameter;
029import org.apache.reef.wake.EventHandler;
030
031import javax.inject.Inject;
032import java.util.logging.Level;
033import java.util.logging.Logger;
034
035
036/**
037 * The error handler REEF registers with Wake.
038 */
039public final class REEFErrorHandler implements EventHandler<Throwable> {
040
041  private static final Logger LOG = Logger.getLogger(REEFErrorHandler.class.getName());
042
043  // This class is used as the ErrorHandler in the RemoteManager. Hence, we need an InjectionFuture here.
044  private final InjectionFuture<RemoteManager> remoteManager;
045  private final String launchID;
046  private final String errorHandlerRID;
047  private final ExceptionCodec exceptionCodec;
048
049  @Inject
050  REEFErrorHandler(final InjectionFuture<RemoteManager> remoteManager,
051                   final @Parameter(ErrorHandlerRID.class) String errorHandlerRID,
052                   final @Parameter(LaunchID.class) String launchID,
053                   final ExceptionCodec exceptionCodec) {
054    this.errorHandlerRID = errorHandlerRID;
055    this.remoteManager = remoteManager;
056    this.launchID = launchID;
057    this.exceptionCodec = exceptionCodec;
058  }
059
060  @Override
061  public void onNext(final Throwable e) {
062    LOG.log(Level.SEVERE, "Uncaught exception.", e);
063    // TODO: This gets a new EventHandler each time an exception is caught. It would be better to cache the handler. But
064    // that introduces threading issues and isn't really worth it, as the JVM typically will be killed once we catch an
065    // Exception in here.
066    if (!this.errorHandlerRID.equals(ErrorHandlerRID.NONE)) {
067      final EventHandler<ReefServiceProtos.RuntimeErrorProto> runtimeErrorHandler = this.remoteManager.get()
068          .getHandler(errorHandlerRID, ReefServiceProtos.RuntimeErrorProto.class);
069      final ReefServiceProtos.RuntimeErrorProto message = ReefServiceProtos.RuntimeErrorProto.newBuilder()
070          .setName("reef")
071          .setIdentifier(launchID)
072          .setMessage(e.getMessage())
073          .setException(ByteString.copyFrom(this.exceptionCodec.toBytes(e)))
074          .build();
075      try {
076        runtimeErrorHandler.onNext(message);
077      } catch (final Throwable t) {
078        LOG.log(Level.SEVERE, "Unable to send the error upstream", t);
079      }
080    } else {
081      LOG.log(Level.SEVERE, "Caught an exception from Wake we cannot send upstream because there is no upstream");
082    }
083  }
084
085  public void close() {
086    try {
087      this.remoteManager.get().close();
088    } catch (final Throwable ex) {
089      LOG.log(Level.SEVERE, "Unable to close the remote manager", ex);
090    }
091  }
092
093  @Override
094  public String toString() {
095    return "REEFErrorHandler{" +
096        "remoteManager=" + remoteManager +
097        ", launchID='" + launchID + '\'' +
098        ", errorHandlerRID='" + errorHandlerRID + '\'' +
099        '}';
100  }
101}