org.apache.metron.helpers.topology.ErrorUtils.java Source code

Introduction

Here is the source code for org.apache.metron.helpers.topology.ErrorUtils.java

Source

/**
 * 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.metron.helpers.topology;

import java.net.InetAddress;
import java.net.UnknownHostException;

import backtype.storm.task.OutputCollector;
import backtype.storm.tuple.Values;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.metron.Constants;
import org.json.simple.JSONObject;

public class ErrorUtils {

    @SuppressWarnings("unchecked")
    public static JSONObject generateErrorMessage(String message, Throwable t) {
        JSONObject error_message = new JSONObject();

        /*
         * Save full stack trace in object.
         */
        String stackTrace = ExceptionUtils.getStackTrace(t);

        String exception = t.toString();

        error_message.put("time", System.currentTimeMillis());
        try {
            error_message.put("hostname", InetAddress.getLocalHost().getHostName());
        } catch (UnknownHostException ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        }

        error_message.put("message", message);
        error_message.put(Constants.SOURCE_TYPE, "error");
        error_message.put("exception", exception);
        error_message.put("stack", stackTrace);

        return error_message;
    }

    public static void handleError(OutputCollector collector, Throwable t, String errorStream) {
        JSONObject error = ErrorUtils.generateErrorMessage(t.getMessage(), t);
        collector.emit(errorStream, new Values(error));
        collector.reportError(t);
    }
}