org.snmp4j.agent.io.MOServerPersistence Maven / Gradle / Ivy

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/*_############################################################################
  _##
  _##  SNMP4J-Agent - MOServerPersistence.java
  _##
  _##  Copyright (C) 2005-2009  Frank Fock (SNMP4J.org)
  _##
  _##  Licensed 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.snmp4j.agent.io;

import org.snmp4j.smi.OctetString;
import java.io.IOException;
import java.util.LinkedHashMap;
import org.snmp4j.agent.ManagedObject;
import java.util.Iterator;
import org.snmp4j.agent.SerializableManagedObject;
import java.util.HashMap;
import java.util.Map.Entry;
import org.snmp4j.agent.MOScope;
import org.snmp4j.agent.MOContextScope;
import org.snmp4j.log.LogFactory;
import org.snmp4j.log.LogAdapter;
import org.snmp4j.agent.MOServer;
import java.util.HashSet;
import java.util.Set;
import java.util.Arrays;

/**
 * The MOServerPersistence provides persistence operations
 * to load and save serialized MIB data.
 *
 * @author Frank Fock
 * @version 1.4
 */
public class MOServerPersistence {

  private static final LogAdapter logger =
      LogFactory.getLogger(MOServerPersistence.class);

  private MOServer[] servers;

  public MOServerPersistence(MOServer server) {
    this(new MOServer[] { server });
  }

  public MOServerPersistence(MOServer[] moServers) {
    this.servers = moServers;
  }

  private HashMap buildCache() {
    HashMap serializableMO = new HashMap();
    serializableMO.clear();
    for (int i=0; iMOOutput instance to store the data.
   * @throws IOException
   *    if the output stream cannot be written.
   */
  public synchronized void saveData(MOOutput output) throws IOException {
    HashMap serializableMO = buildCache();
    // write context independent data
    LinkedHashMap mos = (LinkedHashMap) serializableMO.get(null);
    if (logger.isDebugEnabled()) {
      logger.debug("Trying to write MIB data for all contexts");
    }
    if (mos != null) {
      writeData(output, null, mos);
    }
    else {
      output.writeSequence(new Sequence(0));
    }
    Set contextSet = new HashSet();
    for (int i=0; i