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Java Utils collections, development by Nervousync Studio (NSYC)
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/*
* Licensed to the Nervousync Studio (NSYC) 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 com.nervousync.utils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.Target;
import org.snmp4j.UserTarget;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.MPv3;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.security.AuthMD5;
import org.snmp4j.security.AuthSHA;
import org.snmp4j.security.Priv3DES;
import org.snmp4j.security.PrivDES;
import org.snmp4j.security.SecurityLevel;
import org.snmp4j.security.SecurityModels;
import org.snmp4j.security.SecurityProtocols;
import org.snmp4j.security.USM;
import org.snmp4j.security.UsmUser;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultTcpTransportMapping;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import com.nervousync.commons.beans.snmp.SNMPData;
import com.nervousync.commons.beans.snmp.TargetHost;
import com.nervousync.commons.core.Globals;
import com.nervousync.commons.snmp.SNMPDataOperator;
import com.nervousync.enumerations.net.IPProtocol;
import com.nervousync.enumerations.snmp.SNMPVersion;
import com.nervousync.enumerations.snmp.auth.SNMPAuthType;
import com.nervousync.exceptions.snmp.ProcessorConfigException;
/**
* @author Steven Wee [email protected]
* @version $Revision: 1.0 $ $Date: Oct 25, 2017 8:50:34 PM $
*/
public final class SNMPUtils {
private static SNMPUtils INSTANCE = null;
private static final Logger LOGGER = LoggerFactory.getLogger(SNMPUtils.class);
private static final String PROTOCOL_UDP = "udp:";
private static final String PROTOCOL_TCP = "tcp:";
private static final OctetString NOAUTH_NOPRIV = new OctetString("noAuthUser");
private static final OctetString AUTH_NOPRIV = new OctetString("authUser");
private static final OctetString AUTH_PRIV = new OctetString("privUser");
private IPProtocol protocol = null;
private int period = 5;
private List existsHosts = null;
private ScheduledExecutorService scheduledExecutorService = null;
private Snmp snmp = null;
private SNMPUtils(IPProtocol protocol, int serverCount) throws IOException {
this.protocol = protocol;
this.existsHosts = new ArrayList(serverCount);
this.scheduledExecutorService = Executors.newScheduledThreadPool(serverCount);
switch (this.protocol) {
case TCP:
this.snmp = new Snmp(new DefaultTcpTransportMapping());
break;
case UDP:
this.snmp = new Snmp(new DefaultUdpTransportMapping());
break;
}
this.snmp.listen();
}
public static boolean initialize(int serverCount) {
return SNMPUtils.initialize(IPProtocol.UDP, serverCount);
}
public static boolean initialize(IPProtocol protocol, int serverCount) {
try {
SNMPUtils.INSTANCE = new SNMPUtils(protocol, serverCount);
return true;
} catch (IOException e) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Initialize instance error! {}", e);
}
return Globals.DEFAULT_VALUE_BOOLEAN;
}
}
public static SNMPUtils getInstance() {
return SNMPUtils.INSTANCE;
}
public boolean addMonitor(String identifiedKey, TargetHost targetHost,
List pduList, SNMPDataOperator snmpDataOperator) {
if (this.existsHosts.contains(targetHost)) {
return true;
}
try {
this.scheduledExecutorService.scheduleAtFixedRate(
new SNMPProcessor(identifiedKey, targetHost, pduList, snmpDataOperator),
0L, this.period, TimeUnit.SECONDS);
return true;
} catch (ProcessorConfigException e) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Add monitor target host error! {}", e);
}
return Globals.DEFAULT_VALUE_BOOLEAN;
}
}
/**
* @return the period
*/
public int getPeriod() {
return period;
}
/**
* @param period the period to set
*/
public void setPeriod(int period) {
this.period = period;
}
public void destroy() throws IOException {
this.scheduledExecutorService.shutdownNow();
this.snmp.close();
}
private List retrieveData(Target target, PDU pdu) {
if (this.snmp != null) {
try {
ResponseEvent responseEvent = this.snmp.send(pdu, target);
if (responseEvent != null && responseEvent.getResponse() != null) {
PDU response = responseEvent.getResponse();
if (response.getErrorIndex() == PDU.noError
&& response.getErrorStatus() == PDU.noError) {
return response.getBindingList(new OID());
}
}
} catch (IOException e) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Retrieve snmp data error! {}", e);
}
}
}
return null;
}
private static final class SNMPProcessor implements Runnable {
private String identifiedKey;
private Target target = null;
private List pduList = null;
private SNMPDataOperator snmpDataOperator = null;
public SNMPProcessor(String identifiedKey, TargetHost targetHost, List pduList,
SNMPDataOperator snmpDataOperator) throws ProcessorConfigException {
if (identifiedKey == null || targetHost == null || pduList == null
|| pduList.isEmpty() || snmpDataOperator == null) {
throw new ProcessorConfigException("Argument invalid");
}
this.identifiedKey = identifiedKey;
this.target = SNMPUtils.getInstance().generateTarget(targetHost);
this.pduList = pduList;
this.snmpDataOperator = snmpDataOperator;
}
@Override
public void run() {
SNMPData snmpData = new SNMPData();
snmpData.setIdentifiedKey(this.identifiedKey);
for (PDU pdu : this.pduList) {
List returnList =
SNMPUtils.getInstance().retrieveData(this.target, pdu);
if (returnList != null) {
for (VariableBinding variableBinding : returnList) {
snmpData.addData(variableBinding.getOid().toString(),
variableBinding.getVariable().toString());
}
}
}
this.snmpDataOperator.operateData(snmpData);
}
}
private Target generateTarget(TargetHost targetHost) {
if (targetHost == null) {
return null;
}
String address = null;
switch (this.protocol) {
case TCP:
address = PROTOCOL_TCP + targetHost.getIpAddress() + "/" + targetHost.getPort();
break;
case UDP:
address = PROTOCOL_UDP + targetHost.getIpAddress() + "/" + targetHost.getPort();
break;
}
Target target = null;
if (SNMPVersion.VERSION3.equals(targetHost.getVersion())) {
USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(MPv3.createLocalEngineID()), 0);
SecurityModels.getInstance().addSecurityModel(usm);
target = new UserTarget();
OctetString securityName = null;
OID authProtocol = null;
OctetString authPassword = null;
OID privProtocol = null;
OctetString privPassword = null;
if (SNMPAuthType.NOAUTH_NOPRIV.equals(targetHost.getAuth())) {
target.setSecurityLevel(SecurityLevel.NOAUTH_NOPRIV);
securityName = NOAUTH_NOPRIV;
} else if (SNMPAuthType.AUTH_NOPRIV.equals(targetHost.getAuth())) {
target.setSecurityLevel(SecurityLevel.AUTH_NOPRIV);
securityName = AUTH_NOPRIV;
switch (targetHost.getAuthProtocol()) {
case MD5:
authProtocol = AuthMD5.ID;
break;
case SHA:
authProtocol = AuthSHA.ID;
break;
}
authPassword = new OctetString(targetHost.getAuthPassword());
} else if (SNMPAuthType.AUTH_PRIV.equals(targetHost.getAuth())) {
target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
securityName = AUTH_PRIV;
switch (targetHost.getAuthProtocol()) {
case MD5:
authProtocol = AuthMD5.ID;
break;
case SHA:
authProtocol = AuthSHA.ID;
break;
}
authPassword = new OctetString(targetHost.getAuthPassword());
switch (targetHost.getPrivProtocol()) {
case PrivDES:
privProtocol = PrivDES.ID;
break;
case Priv3DES:
privProtocol = Priv3DES.ID;
break;
}
privPassword = new OctetString(targetHost.getPrivPassword());
}
target.setSecurityName(securityName);
UsmUser usmUser = new UsmUser(securityName, authProtocol, authPassword, privProtocol, privPassword);
this.snmp.getUSM().addUser(securityName, usmUser);
} else {
target = new CommunityTarget();
((CommunityTarget)target).setCommunity(new OctetString(targetHost.getCommunity()));
}
target.setAddress(GenericAddress.parse(address));
target.setRetries(targetHost.getRetries());
target.setTimeout(targetHost.getTimeOut());
switch (targetHost.getVersion()) {
case VERSION1:
target.setVersion(SnmpConstants.version1);
break;
case VERSION2C:
target.setVersion(SnmpConstants.version2c);
break;
case VERSION3:
target.setVersion(SnmpConstants.version3);
break;
}
return target;
}
}