org.apache.nifi.snmp.operations.SNMPResourceHandler Maven / Gradle / Ivy
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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
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
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package org.apache.nifi.snmp.operations;
import org.apache.nifi.processor.exception.ProcessException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snmp4j.Snmp;
import org.snmp4j.Target;
import org.snmp4j.security.SecurityModels;
import org.snmp4j.smi.Integer32;
import java.io.IOException;
public class SNMPResourceHandler {
public static final String INVALID_FLOWFILE_EXCEPTION_MESSAGE = "Could not read the variable bindings from the " +
"flowfile. Please, add the OIDs to set in separate properties. E.g. Property name: snmp$1.3.6.1.2.1.1.1.0 " +
"Value: Example value. ";
public static final String REQUEST_TIMEOUT_EXCEPTION_TEMPLATE = "Request timed out. Please check if (1). the " +
"agent host and port is correctly set, (2). the agent is running, (3). the agent SNMP version corresponds" +
" with the processor's one, (4) the community string is correct and has %1$s access, (5) In case of SNMPv3" +
" check if the user credentials are valid and the user in a group with %1$s access.";
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final Snmp snmpManager;
private final Target target;
public SNMPResourceHandler(final Snmp snmpManager, final Target target) {
this.snmpManager = snmpManager;
this.target = target;
}
public Snmp getSnmpManager() {
return snmpManager;
}
public Target getTarget() {
return target;
}
public void close() {
try {
if (snmpManager.getUSM() != null) {
snmpManager.getUSM().removeAllUsers();
SecurityModels.getInstance().removeSecurityModel(new Integer32(snmpManager.getUSM().getID()));
}
snmpManager.close();
} catch (IOException e) {
final String errorMessage = "Could not close SNMP manager.";
logger.error(errorMessage, e);
throw new ProcessException(errorMessage);
}
}
}