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ActiveMQ example source code file (DefaultIOExceptionHandler.java)

This example ActiveMQ source code file (DefaultIOExceptionHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

atomicboolean, exception, failure, ignoring, ignoring, io, io, jdbc, servicestopper, sql, stopping, string, string, thread, thread, threading, threads, throwable

The ActiveMQ DefaultIOExceptionHandler.java source code

/**
 * 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.activemq.util;

import java.io.IOException;
import java.sql.SQLException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

import org.apache.activemq.broker.BrokerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @org.apache.xbean.XBean
 */
 public class DefaultIOExceptionHandler implements IOExceptionHandler {

    private static final Logger LOG = LoggerFactory
            .getLogger(DefaultIOExceptionHandler.class);
    private BrokerService broker;
    private boolean ignoreAllErrors = false;
    private boolean ignoreNoSpaceErrors = true;
    private boolean ignoreSQLExceptions = true;
    private boolean stopStartConnectors = false;
    private String noSpaceMessage = "space";
    private String sqlExceptionMessage = ""; // match all
    private long resumeCheckSleepPeriod = 5*1000;
    private AtomicBoolean stopStartInProgress = new AtomicBoolean(false);

    public void handle(IOException exception) {
        if (ignoreAllErrors) {
            LOG.info("Ignoring IO exception, " + exception, exception);
            return;
        }

        if (ignoreNoSpaceErrors) {
            Throwable cause = exception;
            while (cause != null && cause instanceof IOException) {
                if (cause.getMessage().contains(noSpaceMessage)) {
                    LOG.info("Ignoring no space left exception, " + exception, exception);
                    return;
                }
                cause = cause.getCause();
            }
        }

        if (ignoreSQLExceptions) {
            Throwable cause = exception;
            while (cause != null) {
                if (cause instanceof SQLException && cause.getMessage().contains(sqlExceptionMessage)) {
                    LOG.info("Ignoring SQLException, " + exception, cause);
                    return;
                }
                cause = cause.getCause();
            }
        }

        if (stopStartConnectors) {
            if (!stopStartInProgress.compareAndSet(false, true)) {
                // we are already working on it
                return;
            }
            LOG.info("Initiating stop/restart of broker transport due to IO exception, " + exception, exception);

            new Thread("stop transport connectors on IO exception") {
                public void run() {
                    try {
                        ServiceStopper stopper = new ServiceStopper();
                        broker.stopAllConnectors(stopper);
                    } catch (Exception e) {
                        LOG.warn("Failure occurred while stopping broker connectors", e);
                    }
                }
            }.start();

            // resume again
            new Thread("restart transport connectors post IO exception") {
                public void run() {
                    try {
                        while (isPersistenceAdapterDown()) {
                            LOG.info("waiting for broker persistence adapter checkpoint to succeed before restarting transports");
                            TimeUnit.MILLISECONDS.sleep(resumeCheckSleepPeriod);
                        }
                        broker.startAllConnectors();
                    } catch (Exception e) {
                        LOG.warn("Failure occurred while restarting broker connectors", e);
                    } finally {
                        stopStartInProgress.compareAndSet(true, false);
                    }
                }

                private boolean isPersistenceAdapterDown() {
                    boolean checkpointSuccess = false;
                    try {
                        broker.getPersistenceAdapter().checkpoint(true);
                        checkpointSuccess = true;
                    } catch (Throwable ignored) {}
                    return !checkpointSuccess;
                }
            }.start();

            return;
        }

        LOG.info("Stopping the broker due to IO exception, " + exception, exception);
        new Thread("Stopping the broker due to IO exception") {
            public void run() {
                try {
                    broker.stop();
                } catch (Exception e) {
                    LOG.warn("Failure occurred while stopping broker", e);
                }
            }
        }.start();
    }

    public void setBrokerService(BrokerService broker) {
        this.broker = broker;
    }

    public boolean isIgnoreAllErrors() {
        return ignoreAllErrors;
    }

    public void setIgnoreAllErrors(boolean ignoreAllErrors) {
        this.ignoreAllErrors = ignoreAllErrors;
    }

    public boolean isIgnoreNoSpaceErrors() {
        return ignoreNoSpaceErrors;
    }

    public void setIgnoreNoSpaceErrors(boolean ignoreNoSpaceErrors) {
        this.ignoreNoSpaceErrors = ignoreNoSpaceErrors;
    }

    public String getNoSpaceMessage() {
        return noSpaceMessage;
    }

    public void setNoSpaceMessage(String noSpaceMessage) {
        this.noSpaceMessage = noSpaceMessage;
    }

    public boolean isIgnoreSQLExceptions() {
        return ignoreSQLExceptions;
    }

    public void setIgnoreSQLExceptions(boolean ignoreSQLExceptions) {
        this.ignoreSQLExceptions = ignoreSQLExceptions;
    }

    public String getSqlExceptionMessage() {
        return sqlExceptionMessage;
    }

    public void setSqlExceptionMessage(String sqlExceptionMessage) {
        this.sqlExceptionMessage = sqlExceptionMessage;
    }

    public boolean isStopStartConnectors() {
        return stopStartConnectors;
    }

    public void setStopStartConnectors(boolean stopStartConnectors) {
        this.stopStartConnectors = stopStartConnectors;
    }

    public long getResumeCheckSleepPeriod() {
        return resumeCheckSleepPeriod;
    }

    public void setResumeCheckSleepPeriod(long resumeCheckSleepPeriod) {
        this.resumeCheckSleepPeriod = resumeCheckSleepPeriod;
    }
}

Other ActiveMQ examples (source code examples)

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