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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
*
* 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.apache.camel.component.smpp;
import java.io.IOException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.camel.Processor;
import org.apache.camel.support.DefaultConsumer;
import org.apache.camel.support.task.BlockingTask;
import org.jsmpp.DefaultPDUReader;
import org.jsmpp.DefaultPDUSender;
import org.jsmpp.SynchronizedPDUSender;
import org.jsmpp.bean.BindType;
import org.jsmpp.bean.NumberingPlanIndicator;
import org.jsmpp.bean.TypeOfNumber;
import org.jsmpp.extra.SessionState;
import org.jsmpp.session.BindParameter;
import org.jsmpp.session.MessageReceiverListener;
import org.jsmpp.session.SMPPSession;
import org.jsmpp.session.SessionStateListener;
import org.jsmpp.util.DefaultComposer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.camel.component.smpp.SmppUtils.createExecutor;
import static org.apache.camel.component.smpp.SmppUtils.isServiceStopping;
import static org.apache.camel.component.smpp.SmppUtils.isSessionClosed;
import static org.apache.camel.component.smpp.SmppUtils.newReconnectTask;
import static org.apache.camel.component.smpp.SmppUtils.shutdownReconnectService;
/**
* An implementation of consumer which use the SMPP protocol
*/
public class SmppConsumer extends DefaultConsumer {
private static final Logger LOG = LoggerFactory.getLogger(SmppConsumer.class);
private static final String RECONNECT_TASK_NAME = "smpp-consumer-reconnect";
private final SmppConfiguration configuration;
private final MessageReceiverListener messageReceiverListener;
private final SessionStateListener internalSessionStateListener;
private final ReentrantLock reconnectLock = new ReentrantLock();
private final ScheduledExecutorService reconnectService;
private SMPPSession session;
/**
* The constructor which gets a smpp endpoint, a smpp configuration and a processor
*/
public SmppConsumer(SmppEndpoint endpoint, SmppConfiguration config, Processor processor) {
super(endpoint, processor);
this.reconnectService = createExecutor(this, endpoint, RECONNECT_TASK_NAME);
this.configuration = config;
this.internalSessionStateListener = (newState, oldState, source) -> {
if (configuration.getSessionStateListener() != null) {
configuration.getSessionStateListener().onStateChange(newState, oldState, source);
}
if (newState.equals(SessionState.CLOSED)) {
LOG.warn("Lost connection to: {} - trying to reconnect...", getEndpoint().getConnectionString());
closeSession();
reconnect(configuration.getInitialReconnectDelay());
}
};
this.messageReceiverListener
= new MessageReceiverListenerImpl(this, getEndpoint(), getProcessor(), getExceptionHandler());
}
@Override
protected void doStart() throws Exception {
LOG.debug("Connecting to: {}...", getEndpoint().getConnectionString());
super.doStart();
session = createSession();
LOG.info("Connected to: {}", getEndpoint().getConnectionString());
}
private SMPPSession createSession() throws IOException {
SMPPSession newSession = createSMPPSession();
newSession.setEnquireLinkTimer(configuration.getEnquireLinkTimer());
newSession.setTransactionTimer(configuration.getTransactionTimer());
newSession.setPduProcessorDegree(this.configuration.getPduProcessorDegree());
newSession.setQueueCapacity(this.configuration.getPduProcessorQueueCapacity());
newSession.addSessionStateListener(internalSessionStateListener);
newSession.setMessageReceiverListener(messageReceiverListener);
newSession.connectAndBind(this.configuration.getHost(), this.configuration.getPort(),
new BindParameter(
BindType.BIND_RX, this.configuration.getSystemId(),
this.configuration.getPassword(), this.configuration.getSystemType(),
TypeOfNumber.UNKNOWN, NumberingPlanIndicator.UNKNOWN,
configuration.getAddressRange()));
return newSession;
}
/**
* Factory method to easily instantiate a SMPPSession
*
* @return the SMPPSession
*/
SMPPSession createSMPPSession() {
return new SMPPSession(
new SynchronizedPDUSender(
new DefaultPDUSender(
new DefaultComposer())),
new DefaultPDUReader(), SmppConnectionFactory
.getInstance(configuration));
}
@Override
protected void doStop() throws Exception {
shutdownReconnectService(reconnectService);
LOG.debug("Disconnecting from: {}...", getEndpoint().getConnectionString());
super.doStop();
closeSession();
LOG.info("Disconnected from: {}", getEndpoint().getConnectionString());
}
private void closeSession() {
if (session != null) {
session.removeSessionStateListener(this.internalSessionStateListener);
session.unbindAndClose();
// clear session as we closed it successfully
session = null;
}
}
private boolean doReconnect() {
try {
LOG.info("Trying to reconnect to {}", getEndpoint().getConnectionString());
if (isServiceStopping(this)) {
return true;
}
if (isSessionClosed(session)) {
return tryCreateSession();
}
LOG.info("Nothing to do: the session is not closed");
} catch (Exception e) {
LOG.error("Unable to reconnect to {}: {}", getEndpoint().getConnectionString(), e.getMessage(), e);
return false;
}
return true;
}
private boolean tryCreateSession() {
try {
LOG.info("Creating a new session to {}", getEndpoint().getConnectionString());
session = createSession();
LOG.info("Reconnected to {}", getEndpoint().getConnectionString());
return true;
} catch (IOException e) {
LOG.warn("Failed to reconnect to {}", getEndpoint().getConnectionString());
closeSession();
return false;
}
}
private void reconnect(final long initialReconnectDelay) {
if (reconnectLock.tryLock()) {
BlockingTask task = newReconnectTask(reconnectService, RECONNECT_TASK_NAME, initialReconnectDelay,
configuration.getReconnectDelay(),
configuration.getMaxReconnect());
try {
task.run(this::doReconnect);
} finally {
reconnectLock.unlock();
}
} else {
LOG.warn("Thread {} could not acquire a lock for creating the session during consumer reconnection",
Thread.currentThread().getId());
}
}
@Override
public String toString() {
return "SmppConsumer[" + getEndpoint().getConnectionString() + "]";
}
@Override
public SmppEndpoint getEndpoint() {
return (SmppEndpoint) super.getEndpoint();
}
/**
* Returns the smpp configuration
*
* @return the configuration
*/
public SmppConfiguration getConfiguration() {
return configuration;
}
}
