snmp trap的接收（jdmk方式）

   snmp中告警的接收可以使用jdmk中的SnmpTrapListener，采用jdmk接收snmp trap的方式如下，先定义接收的线程，再用继承自SnmpTrapListener的类处理snmp的trap。详细内容见代码。

代码如下：

public class SnmpListener {
   
    /**
     * Main entry point.
     */
    public static void main(String argv[]) {
     
        try {
        	//创建一个DaemonTaskServer处理snmp的traps
        	//你也可以不用DaemonTaskServer，但使用DaemonTaskServer
        	//处理收到的PDU单元，可以更快的腾出来用于接收trap的socket，
        	//这样可以减少丢包（trap是udp包）
	        //把DaemonTaskServer的线程设置为NORM_PRIORITY，这样
        	//trap接收的线程可以优先于trap处理的线程
	    final DaemonTaskServer taskServer = new DaemonTaskServer();
	    taskServer.start(Thread.NORM_PRIORITY);
	    //为snmp的trap包创建分配器（SnmpEventReportDispatcher）和监听器
        //SnmpEventReportDispatcher做为一个线程运行，并且在指定的端口监听traps  
	    final SnmpEventReportDispatcher trapAgent = 
			new SnmpEventReportDispatcher(Integer.parseInt("8085")+1,
						      null,taskServer,null);
	    //把TrapListenerImpl作为snmp trap的监听器
	    // TrapListenerImpl处理trap pdu包
	        trapAgent.addTrapListener(new TrapListenerImpl());
	        final Thread trapThread = new Thread(trapAgent);
		    trapThread.setPriority(Thread.MAX_PRIORITY);
		    trapThread.start();
            Thread.sleep(4000);
       
            println("\n>> Press <Enter> if you want to stop" + 
		    " this SNMP manager.\n");
            java.lang.System.in.read();
            
           
	    //stop the SnmpEventReportDispatcher.
	    trapAgent.close();
	    taskServer.terminate();
        java.lang.System.exit(0);
        } catch(Exception e) {
            java.lang.System.err.println("AsyncManager::main: "+ 
					 "Exception occurred:" + e );
            e.printStackTrace();
        }
    }

 实际处理trap的pdu包的类：

public class TrapListenerImpl implements SnmpTrapListener {

    public void processSnmpTrapV1(SnmpPduTrap trap) {
        println("NOTE: TrapListenerImpl received trap :");
        println("\tGeneric " + trap.genericTrap);
        println("\tSpecific " + trap.specificTrap);
        println("\tTimeStamp " + trap.timeStamp);
        println("\tAgent adress " + trap.agentAddr.stringValue());
    }

    public void processSnmpTrapV2(SnmpPduRequest trap) {
        println("NOTE: Trap V2 not of interest !!!");
    }

    public void processSnmpTrapV3(SnmpScopedPduRequest trap) {
	println("NOTE: TrapListenerImpl received trap V3:");
	println("\tContextEngineId : " + 
		SnmpEngineId.createEngineId(trap.contextEngineId));
	println("\tContextName : " + new String(trap.contextName));
	println("\tVarBind list :");
	for(int i = 0; i < trap.varBindList.length; i++)
	    println("oid : " + trap.varBindList[i].getOid() + " val : " + 
		    trap.varBindList[i].getSnmpValue());
	
    }

    /**
     * print/println stuff...
     */

    private final static void println(String msg) {
	java.lang.System.out.println(msg);
    }

    private final static void print(String msg) {
	java.lang.System.out.print(msg);
    }
}

 

顺便发一段法送SnmpTrapV1的代码：

public static void main(String args[]) {

		try {
			// Bind the adaptor. By default port 161 is used.
			// For the example, we are going to use a on standard port.
			//
			// If you wish to use the standard SNMP ports, just comment
			// out the following line:
			// port = 8085;
			//
			int port = 8085;
			snmpAdaptor = new SnmpAdaptorServer(port);
			println("NOTE: SNMP Adaptor is bound on port " + port);

			// Start the adaptor.
			//
			snmpAdaptor.start();

			// Send a coldStart SNMP Trap.
			//
			print("NOTE: Sending a coldStart SNMP trap to"
					+ " each destination defined in the ACL file...");
			snmpAdaptor.setTrapPort(new Integer(port + 1));
			snmpAdaptor.snmpV1Trap(0, 0, null);
			println("v1 Done.");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

 使用snmpAdaptor.snmpV1Trap(0, 0, null)可以像目的端（接收snmp trap的程序）发送一个trap。

评论

3 楼 congjl2002 2012-09-25  

误，整理好了在发

phk070832 写道

垃圾代码，一大推的编译错误，整理好了在发表吧。

您一定是缺少了一些必要的包，或者您把错误贴上来大家一起分析

2 楼 phk070832 2012-07-06  

垃圾代码，一大推的编译错误，整理好了在发表吧。

1 楼 congjl2002 2008-08-07