/*
* Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.databridge.agent.endpoint;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.databridge.agent.conf.DataEndpointConfiguration;
import org.wso2.carbon.databridge.agent.exception.DataEndpointAuthenticationException;
import org.wso2.carbon.databridge.agent.exception.DataEndpointException;
/**
* DataEndpoint Connection worker class implementation.
*/
public class DataEndpointConnectionWorker implements Runnable {
private static Log log = LogFactory.getLog(DataEndpointConnectionWorker.class);
private DataEndpointConfiguration dataEndpointConfiguration;
private DataEndpoint dataEndpoint;
@Override
public void run() {
if (isInitialized()) {
try {
connect();
dataEndpoint.activate();
} catch (DataEndpointAuthenticationException e) {
log.error("Error while trying to connect to the endpoint. " + e.getErrorMessage(), e);
dataEndpoint.deactivate();
}
} else {
String errorMsg = "Data endpoint connection worker is not properly initialized ";
if (dataEndpoint == null) errorMsg += ", data Endpoint is not provided ";
if (dataEndpointConfiguration == null) errorMsg += ", data Endpoint configuration is not provided";
errorMsg += ".";
log.error(errorMsg);
}
}
DataEndpointConfiguration getDataEndpointConfiguration() {
return dataEndpointConfiguration;
}
/**
* Initialize the data endpoint connection worker.
* A connection worker can be instantiated only ONE time.
*
* @param dataEndpoint DataEndpoint instance to handle the connection.
* @param dataEndpointConfiguration DataEndpointConfiguration to handle the connection.
* @throws DataEndpointException
*/
public void initialize(DataEndpoint dataEndpoint, DataEndpointConfiguration dataEndpointConfiguration)
throws DataEndpointException {
if (this.dataEndpointConfiguration == null) {
this.dataEndpointConfiguration = dataEndpointConfiguration;
} else {
throw new DataEndpointException("Already data endpoint configuration is set: " +
this.dataEndpointConfiguration.toString() + " for the endpoint " +
dataEndpointConfiguration.toString());
}
if (this.dataEndpoint == null) {
this.dataEndpoint = dataEndpoint;
} else {
throw new DataEndpointException("Already data endpoint is configured for the connection worker");
}
}
private void connect() throws DataEndpointAuthenticationException {
Object client = null;
try {
client = this.dataEndpointConfiguration.getSecuredTransportPool().
borrowObject(dataEndpointConfiguration.getAuthKey());
String sessionId = this.dataEndpoint.
login(client, dataEndpointConfiguration.getUsername(),
dataEndpointConfiguration.getPassword());
dataEndpointConfiguration.setSessionId(sessionId);
} catch (Throwable e) {
log.error(e.getMessage(), e);
throw new DataEndpointAuthenticationException("Cannot borrow client for " + dataEndpointConfiguration.getAuthURL(), e);
} finally {
try {
this.dataEndpointConfiguration.getSecuredTransportPool().returnObject(dataEndpointConfiguration.getAuthKey(), client);
} catch (Exception e) {
this.dataEndpointConfiguration.getSecuredTransportPool().clear(dataEndpointConfiguration.getAuthKey());
}
}
}
public void disconnect(DataEndpointConfiguration dataPublisherConfiguration) {
Object client = null;
try {
client = this.dataEndpointConfiguration.getSecuredTransportPool().borrowObject(dataPublisherConfiguration.getAuthKey());
this.dataEndpoint.logout(client, dataPublisherConfiguration.getSessionId());
} catch (Exception e) {
if (log.isDebugEnabled()) {
log.debug("Cannot connect to the server at " + dataPublisherConfiguration.getAuthURL() + ", for user: " + dataPublisherConfiguration.getUsername(), e);
}
log.warn("Cannot connect to the server at " + dataPublisherConfiguration.getAuthURL() + ", for user: " + dataPublisherConfiguration.getUsername());
} finally {
try {
this.dataEndpointConfiguration.getSecuredTransportPool().returnObject(dataPublisherConfiguration.getAuthKey(), client);
} catch (Exception e) {
this.dataEndpointConfiguration.getSecuredTransportPool().clear(dataPublisherConfiguration.getAuthKey());
}
}
}
private boolean isInitialized() {
return dataEndpoint != null && dataEndpointConfiguration != null;
}
}