/*
 * 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.geode.test.dunit;

import java.io.Serializable;
import java.util.concurrent.ConcurrentLinkedQueue;

import org.apache.logging.log4j.Logger;

import org.apache.geode.distributed.DistributedSystem;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.internal.logging.LogService;

/**
 * <code>IgnoredException</code> provides static utility methods that will log messages to add or
 * remove <code>IgnoredException</code>s. Each <code>IgnoredException</code> allows you to specify a
 * suspect string that will be ignored by the <code>GrepLogs</code> utility which is run after each
 * <code>DistributedTest</code> test method.
 * 
 * These methods can be used directly: <code>IgnoredException.addIgnoredException(...)</code>,
 * however, they are intended to be referenced through static import:
 *
 * <pre>
 * import static org.apache.geode.test.dunit.IgnoredException.*;
 *    ...
 *    addIgnoredException(...);
 * </pre>
 *
 * A test should use <code>addIgnoredException(...)</code> before executing the code that will
 * potentially log the suspect string. The test should then <code>remove()</code> the
 * <code>IgnoredException</code> immediately after. Note that
 * <code>DistributedTestCase.tearDown()</code> will automatically remove all current
 * <code>IgnoredException</code>s by invoking <code>removeAllIgnoredExceptions</code>.
 * 
 * A suspect string is typically an Exception class and/or message string.
 *
 * The <code>GrepLogs</code> utility is part of Hydra which is not included in Apache Geode. The
 * Hydra class which consumes logs and reports suspect strings is
 * <code>batterytest.greplogs.GrepLogs</code>.
 * 
 * Extracted from DistributedTestCase.
 * 
 * @since GemFire 5.7bugfix
 */
@SuppressWarnings("serial")
public class IgnoredException implements Serializable {

  private static final Logger logger = LogService.getLogger();

  private final String suspectString;

  private final transient VM vm;

  private static ConcurrentLinkedQueue<IgnoredException> ignoredExceptions =
      new ConcurrentLinkedQueue<IgnoredException>();

  public IgnoredException(final String suspectString) {
    this.suspectString = suspectString;
    this.vm = null;
  }

  IgnoredException(final String suspectString, final VM vm) {
    this.suspectString = suspectString;
    this.vm = vm;
  }

  String suspectString() {
    return this.suspectString;
  }

  VM vm() {
    return this.vm;
  }

  public String getRemoveMessage() {
    return "<ExpectedException action=remove>" + this.suspectString + "</ExpectedException>";
  }

  public String getAddMessage() {
    return "<ExpectedException action=add>" + this.suspectString + "</ExpectedException>";
  }

  public void remove() {
    final String removeMessage = getRemoveMessage();

    @SuppressWarnings("serial")
    SerializableRunnable removeRunnable =
        new SerializableRunnable(IgnoredException.class.getSimpleName() + " remove") {
          public void run() {
            // TODO: delete use of system.getLogWriter
            DistributedSystem system = InternalDistributedSystem.getConnectedInstance();
            if (system != null) {
              system.getLogWriter().info(removeMessage);
            }

            // TODO: delete use of LogWriterUtils
            try {
              LogWriterUtils.getLogWriter().info(removeMessage);
            } catch (Exception noHydraLogger) {
            }

            logger.info(removeMessage);
          }
        };

    try {
      removeRunnable.run();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }

    if (this.vm != null) {
      vm.invoke(removeRunnable);
    } else {
      Invoke.invokeInEveryVM(removeRunnable);
    }
  }

  public static void removeAllExpectedExceptions() {
    IgnoredException ignoredException;
    while ((ignoredException = ignoredExceptions.poll()) != null) {
      ignoredException.remove();
    }
  }

  /**
   * Log in all VMs, in both the test logger and the GemFire logger the ignored exception string to
   * prevent grep logs from complaining. The suspect string is used by the GrepLogs utility and so
   * can contain regular expression characters.
   * 
   * @since GemFire 5.7bugfix
   * @param suspectString the exception string to expect
   * @param vm the VM on which to log the expected exception or null for all VMs
   * @return an IgnoredException instance for removal purposes
   */
  public static IgnoredException addIgnoredException(final String suspectString, final VM vm) {
    final IgnoredException ignoredException = new IgnoredException(suspectString, vm);
    final String addMessage = ignoredException.getAddMessage();

    @SuppressWarnings("serial")
    SerializableRunnable addRunnable =
        new SerializableRunnable(IgnoredException.class.getSimpleName() + " addIgnoredException") {
          public void run() {
            // TODO: delete use of system.getLogWriter
            DistributedSystem system = InternalDistributedSystem.getConnectedInstance();
            if (system != null) {
              system.getLogWriter().info(addMessage);
            }

            // TODO: delete use of LogWriterUtils
            try {
              LogWriterUtils.getLogWriter().info(addMessage);
            } catch (Exception noHydraLogger) {
            }

            logger.info(addMessage);
          }
        };

    try {
      addRunnable.run();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }

    if (vm != null) {
      vm.invoke(addRunnable);
    } else {
      Invoke.invokeInEveryVM(addRunnable);
    }

    ignoredExceptions.add(ignoredException);
    return ignoredException;
  }

  /**
   * Log in all VMs, in both the test logger and the GemFire logger the ignored exception string to
   * prevent grep logs from complaining. The suspect string is used by the GrepLogs utility and so
   * can contain regular expression characters.
   * 
   * If you do not remove the ignored exception, it will be removed at the end of your test case
   * automatically.
   * 
   * @since GemFire 5.7bugfix
   * @param suspectString the exception string to expect
   * @return an IgnoredException instance for removal
   */
  public static IgnoredException addIgnoredException(final String suspectString) {
    return addIgnoredException(suspectString, null);
  }
}