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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
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/*
 * 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.internal.admin.remote;

import org.apache.geode.*;
import org.apache.geode.admin.AlertLevel;
import org.apache.geode.distributed.internal.*;
// import org.apache.geode.internal.*;
import org.apache.geode.internal.admin.*;
import org.apache.geode.management.internal.AlertDetails;

import java.io.*;
import java.util.*;
import org.apache.geode.distributed.internal.membership.*;

/**
 * A message that is sent to a particular console distribution manager to notify it of an alert.
 */
public final class AlertListenerMessage extends PooledDistributionMessage
    implements AdminMessageType {
  // instance variables
  private int msgLevel;
  private Date msgDate;
  private String connectionName;
  private String threadName;
  private long tid;
  private String msg;
  private String exceptionText;

  public static AlertListenerMessage create(Object recipient, int msgLevel, Date msgDate,
      String connectionName, String threadName, long tid, String msg, String exceptionText) {
    AlertListenerMessage m = new AlertListenerMessage();
    m.setRecipient((InternalDistributedMember) recipient);
    m.msgLevel = msgLevel;
    m.msgDate = msgDate;
    m.connectionName = connectionName;
    if (m.connectionName == null) {
      m.connectionName = "";
    }
    m.threadName = threadName;
    if (m.threadName == null) {
      m.threadName = "";
    }
    m.tid = tid;
    m.msg = msg;
    if (m.msg == null) {
      m.msg = "";
    }
    m.exceptionText = exceptionText;
    if (m.exceptionText == null) {
      m.exceptionText = "";
    }
    return m;
  }

  @Override
  public void process(DistributionManager dm) {
    RemoteGfManagerAgent agent = dm.getAgent();
    if (agent != null) {
      RemoteGemFireVM mgr = agent.getMemberById(this.getSender());
      if (mgr == null)
        return;
      Alert alert = new RemoteAlert(mgr, msgLevel, msgDate, connectionName, threadName, tid, msg,
          exceptionText, getSender());
      agent.callAlertListener(alert);
    } else {
      /**
       * Its assumed that its a managing node and it has to emit any alerts emitted to it.
       */
      AlertDetails alertDetail = new AlertDetails(msgLevel, msgDate, connectionName, threadName,
          tid, msg, exceptionText, getSender());
      dm.getSystem().handleResourceEvent(ResourceEvent.SYSTEM_ALERT, alertDetail);
    }

  }

  @Override
  public boolean sendViaUDP() {
    return true;
  }

  public int getDSFID() {
    return ALERT_LISTENER_MESSAGE;
  }

  @Override
  public void toData(DataOutput out) throws IOException {
    super.toData(out);
    out.writeInt(msgLevel);
    DataSerializer.writeObject(msgDate, out);
    DataSerializer.writeString(connectionName, out);
    DataSerializer.writeString(threadName, out);
    out.writeLong(tid);
    DataSerializer.writeString(msg, out);
    DataSerializer.writeString(exceptionText, out);
  }

  @Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    super.fromData(in);
    this.msgLevel = in.readInt();
    this.msgDate = (Date) DataSerializer.readObject(in);
    this.connectionName = DataSerializer.readString(in);
    this.threadName = DataSerializer.readString(in);
    this.tid = in.readLong();
    this.msg = DataSerializer.readString(in);
    this.exceptionText = DataSerializer.readString(in);
  }

  @Override
  public String toString() {
    return "Alert \"" + this.msg + "\" level " + AlertLevel.forSeverity(this.msgLevel);
  }

}