uimaj-as-core/src/main/java/org/apache/uima/aae/error/handler/GetMetaErrorHandler.java

/*
 * 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.uima.aae.error.handler;

import java.net.ConnectException;
import java.util.Map;

import org.apache.uima.UIMAFramework;
import org.apache.uima.aae.UIMAEE_Constants;
import org.apache.uima.aae.controller.AggregateAnalysisEngineController;
import org.apache.uima.aae.controller.AnalysisEngineController;
import org.apache.uima.aae.controller.BaseAnalysisEngineController;
import org.apache.uima.aae.controller.Endpoint;
import org.apache.uima.aae.controller.PrimitiveAnalysisEngineController;
import org.apache.uima.aae.delegate.Delegate;
import org.apache.uima.aae.error.ErrorContext;
import org.apache.uima.aae.error.ErrorHandler;
import org.apache.uima.aae.error.ErrorHandlerBase;
import org.apache.uima.aae.error.Threshold;
import org.apache.uima.aae.message.AsynchAEMessage;
import org.apache.uima.util.Level;

public class GetMetaErrorHandler extends ErrorHandlerBase implements ErrorHandler {
  private static final Class CLASS_NAME = GetMetaErrorHandler.class;

  private Map delegateMap = null;

  public GetMetaErrorHandler(Map aDelegateMap) {
    delegateMap = aDelegateMap;
  }

  public Map getEndpointThresholdMap() {
    return delegateMap;
  }

  private boolean terminate(Threshold aThreshold) {
    return (aThreshold == null || aThreshold.getAction() == null
            || aThreshold.getAction().trim().length() == 0 || ErrorHandler.TERMINATE
            .equalsIgnoreCase(aThreshold.getAction()));
  }

  private boolean isConnectionFailure(Exception e) {
    if (e != null && e.getCause() != null && e.getCause() instanceof ConnectException) {
      return true;
    }
    return false;
  }

  public boolean handleError(Throwable t, ErrorContext anErrorContext,
          AnalysisEngineController aController) {
    // GetMeta errors are only handled by the Aggregate AS
    if (aController instanceof PrimitiveAnalysisEngineController
            || !isHandlerForError(anErrorContext, AsynchAEMessage.GetMeta)) {
      return false;
    }

    if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.WARNING)) {
      if ( aController != null ) {
        UIMAFramework.getLogger(CLASS_NAME).logrb(Level.WARNING, CLASS_NAME.getName(),
                "handleError", UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE,
                "UIMAEE_service_exception_WARNING", aController.getComponentName());
      }

      UIMAFramework.getLogger(CLASS_NAME).logrb(Level.WARNING, getClass().getName(), "handleError",
              UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE, "UIMAEE_exception__WARNING", t);
    }
    Endpoint endpoint = (Endpoint) anErrorContext.get(AsynchAEMessage.Endpoint);

    if (endpoint != null && aController instanceof AggregateAnalysisEngineController) {
      Threshold threshold = super.getThreshold(endpoint, delegateMap, aController);
      String key = ((AggregateAnalysisEngineController) aController).lookUpDelegateKey(endpoint
              .getEndpoint());
      Delegate delegate = ((AggregateAnalysisEngineController) aController).lookupDelegate(key);
      if (delegate != null
              && delegate.isAwaitingPingReply()
              || threshold == null
              || threshold.getMaxRetries() == 0
              || (super.retryLastCommand(AsynchAEMessage.GetMeta, endpoint, aController, key,
                      threshold, anErrorContext) == false)) {
        if (terminate(threshold)) {
          if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.FINE)) {
            UIMAFramework.getLogger(CLASS_NAME).logrb(Level.FINE, CLASS_NAME.getName(),
                    "handleError", UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE,
                    "UIMAEE_terminate_service__INFO",
                    new Object[] { aController.getComponentName(), endpoint.getEndpoint() });
          }
          aController.terminate(t);
          // Notify if the error occurred during initialization of the service.
          // If the ping times out, there is no need to notify the listener. We
          // use getMeta request as a ping to check if the service is running.
          if (delegate != null && !delegate.isAwaitingPingReply() && t instanceof Exception) {
            aController.notifyListenersWithInitializationStatus((Exception) t);
          }
        } else {
          aController.takeAction(threshold.getAction(), endpoint.getEndpoint(), anErrorContext);
        }
      }
    } else {
      if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.INFO)) {
        UIMAFramework.getLogger(CLASS_NAME).logrb(Level.INFO, getClass().getName(), "handleError",
                UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE,
                "UIMAEE_no_endpoint_for_getmeta_retry__INFO",
                new Object[] { aController.getName() });
      }
    }
    return true;
  }

  
  public static void main(String[] args) {
    // TODO Auto-generated method stub

  }
}