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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.Exchange;
import org.apache.camel.Message;
import org.apache.camel.support.DefaultProducer;
import org.apache.camel.support.task.BlockingTask;
import org.apache.camel.util.ObjectHelper;
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.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 @{link Producer} which use the SMPP protocol
*/
public class SmppProducer extends DefaultProducer {
private static final Logger LOG = LoggerFactory.getLogger(SmppProducer.class);
private static final String RECONNECT_TASK_NAME = "smpp-producer-reconnect";
private final SmppConfiguration configuration;
private final SessionStateListener internalSessionStateListener;
private final ReentrantLock connectLock = new ReentrantLock();
private final ScheduledExecutorService reconnectService;
private SMPPSession session;
public SmppProducer(SmppEndpoint endpoint, SmppConfiguration config) {
super(endpoint);
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.UNBOUND) || newState.equals(SessionState.CLOSED)) {
LOG.warn(newState.equals(SessionState.UNBOUND)
? "Session to {} was unbound - trying to reconnect" : "Lost connection to: {} - trying to reconnect...",
getEndpoint().getConnectionString());
closeSession();
reconnect(configuration.getInitialReconnectDelay());
}
};
}
@Override
protected void doStart() throws Exception {
super.doStart();
if (!getConfiguration().isLazySessionCreation()) {
if (connectLock.tryLock()) {
try {
session = createSession();
} finally {
connectLock.unlock();
}
} else {
LOG.warn("Thread {} could not acquire a lock for creating the session during producer start",
Thread.currentThread().getId());
}
}
}
private SMPPSession createSession() throws Exception {
LOG.debug("Connecting to: {}...", getEndpoint().getConnectionString());
SMPPSession session = createSMPPSession();
session.setEnquireLinkTimer(this.configuration.getEnquireLinkTimer());
session.setTransactionTimer(this.configuration.getTransactionTimer());
session.setPduProcessorDegree(this.configuration.getPduProcessorDegree());
session.setQueueCapacity(this.configuration.getPduProcessorQueueCapacity());
session.addSessionStateListener(internalSessionStateListener);
BindType bindType = BindType.BIND_TX;
if (ObjectHelper.isNotEmpty(this.configuration.getMessageReceiverRouteId())) {
session.setMessageReceiverListener(new MessageReceiverListenerImpl(
getEndpoint(),
this.configuration.getMessageReceiverRouteId()));
bindType = BindType.BIND_TRX;
}
session.connectAndBind(
this.configuration.getHost(),
this.configuration.getPort(),
new BindParameter(
bindType,
this.configuration.getSystemId(),
this.configuration.getPassword(),
this.configuration.getSystemType(),
TypeOfNumber.valueOf(configuration.getTypeOfNumber()),
NumberingPlanIndicator.valueOf(configuration.getNumberingPlanIndicator()),
"",
configuration.getInterfaceVersionByte()));
LOG.info("Connected to: {}", getEndpoint().getConnectionString());
return session;
}
/**
* Factory method to easily instantiate a mock SMPPSession
*
* @return the SMPPSession
*/
SMPPSession createSMPPSession() {
return new SMPPSession(
new SynchronizedPDUSender(
new DefaultPDUSender(
new DefaultComposer())),
new DefaultPDUReader(), SmppConnectionFactory
.getInstance(configuration));
}
@Override
public void process(Exchange exchange) throws Exception {
if (session == null) {
if (this.configuration.isLazySessionCreation()) {
if (connectLock.tryLock()) {
try {
if (session == null) {
// set the system id and password with which we will try to connect to the SMSC
Message in = exchange.getIn();
String systemId = in.getHeader(SmppConstants.SYSTEM_ID, String.class);
String password = in.getHeader(SmppConstants.PASSWORD, String.class);
if (systemId != null && password != null) {
LOG.info("using the system id '{}' to connect to the SMSC...", systemId);
this.configuration.setSystemId(systemId);
this.configuration.setPassword(password);
}
session = createSession();
}
} finally {
connectLock.unlock();
}
} else {
LOG.warn("Thread {} could not acquire a lock for creating the session during lazy initialization",
Thread.currentThread().getId());
}
}
}
// only possible by trying to reconnect
if (this.session == null) {
throw new IOException("Lost connection to " + getEndpoint().getConnectionString() + " and yet not reconnected");
}
SmppCommand command = getEndpoint().getBinding().createSmppCommand(session, exchange);
command.execute(exchange);
}
@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 void reconnect(final long initialReconnectDelay) {
if (connectLock.tryLock()) {
BlockingTask task = newReconnectTask(reconnectService, RECONNECT_TASK_NAME, initialReconnectDelay,
configuration.getReconnectDelay(), configuration.getMaxReconnect());
try {
task.run(this::doReconnect);
} finally {
connectLock.unlock();
}
} else {
LOG.warn("Thread {} could not acquire a lock for creating the session during producer reconnection",
Thread.currentThread().getId());
}
}
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 {
session = createSession();
return true;
} catch (Exception e) {
LOG.warn("Failed to reconnect to {}", getEndpoint().getConnectionString());
closeSession();
return false;
}
}
@Override
public SmppEndpoint getEndpoint() {
return (SmppEndpoint) super.getEndpoint();
}
/**
* Returns the smppConfiguration for this producer
*
* @return the configuration
*/
public SmppConfiguration getConfiguration() {
return configuration;
}
@Override
public String toString() {
return "SmppProducer[" + getEndpoint().getConnectionString() + "]";
}
}
