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/*
* Licensed 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.jsmpp.session;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketTimeoutException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.jsmpp.DefaultPDUReader;
import org.jsmpp.DefaultPDUSender;
import org.jsmpp.InvalidCommandLengthException;
import org.jsmpp.InvalidResponseException;
import org.jsmpp.PDUException;
import org.jsmpp.PDUReader;
import org.jsmpp.PDUSender;
import org.jsmpp.PDUStringException;
import org.jsmpp.SMPPConstant;
import org.jsmpp.SynchronizedPDUSender;
import org.jsmpp.bean.Bind;
import org.jsmpp.bean.BindType;
import org.jsmpp.bean.Command;
import org.jsmpp.bean.DataCoding;
import org.jsmpp.bean.DataSm;
import org.jsmpp.bean.ESMClass;
import org.jsmpp.bean.InterfaceVersion;
import org.jsmpp.bean.NumberingPlanIndicator;
import org.jsmpp.bean.OptionalParameter;
import org.jsmpp.bean.RegisteredDelivery;
import org.jsmpp.bean.TypeOfNumber;
import org.jsmpp.extra.NegativeResponseException;
import org.jsmpp.extra.PendingResponse;
import org.jsmpp.extra.ProcessRequestException;
import org.jsmpp.extra.QueueMaxException;
import org.jsmpp.extra.ResponseTimeoutException;
import org.jsmpp.extra.SessionState;
import org.jsmpp.session.connection.Connection;
import org.jsmpp.session.connection.ConnectionFactory;
import org.jsmpp.session.connection.socket.SocketConnectionFactory;
import org.jsmpp.util.DefaultComposer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This is an object that used to communicate with an ESME. It hide
* all un-needed SMPP operation that might harm if the user code use it such as:
*
*
*
DELIVER_SM_RESP, should be called only as response to DELIVER_SM
*
UNBIND_RESP, should be called only as response to UNBIND_RESP
*
DATA_SM_RESP, should be called only as response to DATA_SM
*
ENQUIRE_LINK_RESP, should be called only as response to ENQUIRE_LINK
*
GENERIC_NACK, should be called only as response to GENERIC_NACK
*
*
* All SMPP operations (request-response) are blocking, for an example: DELIVER_SM
* will be blocked until DELIVER_SM_RESP received or timeout. This looks like
* synchronous communication, but the {@link SMPPOutboundSession} implementation give
* ability to the asynchronous way by executing the DELIVER_SM operation parallel
* on a different thread. The very simple implementation by using Thread pool,
* {@link ExecutorService} will do.
*
* @author pmoerenhout
*/
public class SMPPOutboundSession extends AbstractSession implements OutboundClientSession {
private static final Logger logger = LoggerFactory.getLogger(SMPPOutboundSession.class);
/* Utility */
private final PDUReader pduReader;
/* Connection */
private final ConnectionFactory connFactory;
private final OutboundResponseHandler responseHandler = new ResponseHandlerImpl();
private Connection conn;
private DataInputStream in;
private OutputStream out;
private PDUReaderWorker pduReaderWorker;
private MessageReceiverListener messageReceiverListener;
private BoundSessionStateListener sessionStateListener = new BoundSessionStateListener();
private SMPPOutboundSessionContext sessionContext = new SMPPOutboundSessionContext(this, sessionStateListener);
private BindRequestReceiver bindRequestReceiver = new BindRequestReceiver(responseHandler);
/**
* Default constructor of {@link SMPPOutboundSession}. The next action might be
* connect and bind to a destination message center.
*
* @see #connectAndOutbind(String, int, String, String)
*/
public SMPPOutboundSession() {
this(new SynchronizedPDUSender(new DefaultPDUSender(new DefaultComposer())),
new DefaultPDUReader(),
SocketConnectionFactory.getInstance());
}
public SMPPOutboundSession(PDUSender pduSender, PDUReader pduReader,
ConnectionFactory connFactory) {
super(pduSender);
this.pduReader = pduReader;
this.connFactory = connFactory;
}
public SMPPOutboundSession(String host, int port, OutbindParameter outbindParam,
PDUSender pduSender, PDUReader pduReader,
ConnectionFactory connFactory) throws IOException {
this(pduSender, pduReader, connFactory);
connectAndOutbind(host, port, outbindParam);
}
@Override
public BindRequest connectAndOutbind(String host, int port, OutbindParameter outbindParam)
throws IOException {
return connectAndOutbind(host, port, outbindParam, 60000);
}
/**
* Open connection and outbind immediately. The default timeout is 60 seconds.
*
* @param host is the ESME host address.
* @param port is the ESME listen port.
* @param systemId is the system id.
* @param password is the password.
* @return the received bind request
* @throws IOException if there is an IO error found.
*/
@Override
public BindRequest connectAndOutbind(String host, int port,
String systemId, String password) throws IOException {
return connectAndOutbind(host, port, new OutbindParameter(systemId, password), 60000);
}
/**
* Open connection and outbind immediately with specified timeout. The default timeout is 60 seconds.
*
* @param host is the ESME host address.
* @param port is the ESME listen port.
* @param systemId is the system id.
* @param password is the password.
* @param timeout is the timeout.
* @return the received bind request
* @throws IOException if there is an IO error found.
*/
@Override
public BindRequest connectAndOutbind(String host, int port,
String systemId, String password, long timeout) throws IOException {
return connectAndOutbind(host, port, new OutbindParameter(systemId, password), timeout);
}
/**
* Open connection and outbind immediately.
*
* @param host is the ESME host address.
* @param port is the ESME listen port.
* @param outbindParameter is the bind parameters.
* @param timeout is the timeout.
* @return the SMSC system id.
* @throws IOException if there is an IO error found.
*/
public BindRequest connectAndOutbind(String host, int port, OutbindParameter outbindParameter, long timeout)
throws IOException {
logger.debug("Connect and bind to {} port {}", host, port);
if (getSessionState() != SessionState.CLOSED) {
throw new IOException("Session state is not closed");
}
conn = connFactory.createConnection(host, port);
logger.info("Connected to {}", conn.getInetAddress());
conn.setSoTimeout(getEnquireLinkTimer());
sessionContext.open();
try {
in = new DataInputStream(conn.getInputStream());
out = conn.getOutputStream();
pduReaderWorker = new PDUReaderWorker(getPduProcessorDegree(), getQueueCapacity());
pduReaderWorker.start();
sendOutbind(outbindParameter.getSystemId(), outbindParameter.getPassword());
}
catch (IOException e) {
logger.error("IO error occurred", e);
close();
throw e;
}
try {
BindRequest bindRequest = waitForBind(timeout);
enquireLinkSender = new EnquireLinkSender();
enquireLinkSender.start();
return bindRequest;
}
catch (IllegalStateException e) {
String message = "System error";
logger.error(message, e);
close();
throw new IOException(message + ": " + e.getMessage(), e);
}
catch (TimeoutException e) {
String message = "Wait for bind response timed out";
logger.error(message, e);
throw new IOException(message + ": " + e.getMessage(), e);
}
}
/**
* Wait for bind request.
*
* @param timeout is the timeout in milliseconds.
* @return the {@link BindRequest}.
* @throws IllegalStateException if this invocation of this method has been made or invoke when state is not OPEN.
* @throws TimeoutException if the timeout has been reach and {@link SMPPServerSession} are no more valid because
* the connection will be close automatically.
*/
private BindRequest waitForBind(long timeout)
throws IllegalStateException, TimeoutException {
SessionState currentSessionState = getSessionState();
if (currentSessionState.equals(SessionState.OPEN)) {
try {
return bindRequestReceiver.waitForRequest(timeout);
}
catch (IllegalStateException e) {
throw new IllegalStateException(
"Invocation of waitForBind() has been made", e);
}
catch (TimeoutException e) {
close();
throw e;
}
}
else {
throw new IllegalStateException(
"waitForBind() should be invoked on OPEN state, actual state is "
+ currentSessionState);
}
}
@Override
public void deliverShortMessage(String serviceType,
TypeOfNumber sourceAddrTon, NumberingPlanIndicator sourceAddrNpi,
String sourceAddr, TypeOfNumber destAddrTon,
NumberingPlanIndicator destAddrNpi, String destinationAddr,
ESMClass esmClass, byte protocoId, byte priorityFlag,
RegisteredDelivery registeredDelivery, DataCoding dataCoding,
byte[] shortMessage, OptionalParameter... optionalParameters)
throws PDUException, ResponseTimeoutException,
InvalidResponseException, NegativeResponseException, IOException {
ensureReceivable("deliverShortMessage");
DeliverSmCommandTask task = new DeliverSmCommandTask(pduSender(),
serviceType, sourceAddrTon, sourceAddrNpi, sourceAddr,
destAddrTon, destAddrNpi, destinationAddr, esmClass, protocoId,
protocoId, registeredDelivery, dataCoding, shortMessage,
optionalParameters);
executeSendCommand(task, getTransactionTimer());
}
@Override
public MessageReceiverListener getMessageReceiverListener() {
return messageReceiverListener;
}
@Override
public void setMessageReceiverListener(
MessageReceiverListener messageReceiverListener) {
this.messageReceiverListener = messageReceiverListener;
}
@Override
protected Connection connection() {
return conn;
}
@Override
protected AbstractSessionContext sessionContext() {
return sessionContext;
}
@Override
protected GenericMessageReceiverListener messageReceiverListener() {
return messageReceiverListener;
}
@Override
protected void finalize() throws Throwable {
close();
super.finalize();
}
private class ResponseHandlerImpl implements OutboundResponseHandler {
public void sendBindResp(String systemId, InterfaceVersion interfaceVersion, BindType bindType, int sequenceNumber)
throws IOException {
sessionContext.bound(bindType);
try {
pduSender().sendBindResp(out, bindType.responseCommandId(), sequenceNumber, systemId, interfaceVersion);
}
catch (PDUStringException e) {
logger.error("Failed sending bind response", e);
// TODO uudashr: we have double checking when accept the bind request
}
}
public DataSmResult processDataSm(DataSm dataSm)
throws ProcessRequestException {
try {
return fireAcceptDataSm(dataSm);
}
catch (ProcessRequestException e) {
throw e;
}
catch (Exception e) {
String msg = "Invalid runtime exception thrown when processing data_sm";
logger.error(msg, e);
throw new ProcessRequestException(msg, SMPPConstant.STAT_ESME_RX_T_APPN);
}
}
@Override
public void sendDataSmResp(DataSmResult dataSmResult, int sequenceNumber)
throws IOException {
try {
pduSender().sendDataSmResp(out, sequenceNumber,
dataSmResult.getMessageId(),
dataSmResult.getOptionalParameters());
}
catch (PDUStringException e) {
/*
* There should be no PDUStringException thrown since creation
* of MessageId should be save.
*/
logger.error("Failed sending data_sm_resp", e);
}
}
@Override
public PendingResponse removeSentItem(int sequenceNumber) {
return removePendingResponse(sequenceNumber);
}
@Override
public void notifyUnbonded() {
sessionContext.unbound();
}
@Override
public void sendDeliverSmResp(int commandStatus, int sequenceNumber, String messageId) throws IOException {
pduSender().sendDeliverSmResp(out, commandStatus, sequenceNumber, messageId);
logger.debug("deliver_sm_resp with sequence_number {} has been sent", sequenceNumber);
}
@Override
public void sendEnquireLinkResp(int sequenceNumber) throws IOException {
logger.debug("Sending enquire_link_resp");
pduSender().sendEnquireLinkResp(out, sequenceNumber);
}
@Override
public void sendGenerickNack(int commandStatus, int sequenceNumber) throws IOException {
pduSender().sendGenericNack(out, commandStatus, sequenceNumber);
}
@Override
public void sendNegativeResponse(int originalCommandId, int commandStatus, int sequenceNumber) throws IOException {
pduSender().sendHeader(out, originalCommandId | SMPPConstant.MASK_CID_RESP, commandStatus, sequenceNumber);
}
@Override
public void sendUnbindResp(int sequenceNumber) throws IOException {
pduSender().sendUnbindResp(out, SMPPConstant.STAT_ESME_ROK, sequenceNumber);
}
@Override
public void processBind(Bind bind) {
SMPPOutboundSession.this.bindRequestReceiver.notifyAcceptBind(bind);
}
}
/**
* Worker to read the PDU.
*
* @author uudashr
*/
private class PDUReaderWorker extends Thread {
// start with serial execution of pdu processing, when the session is bound the pool will be enlarge up to the PduProcessorDegree
private ThreadPoolExecutor pduExecutor = null;
private Runnable onIOExceptionTask = new Runnable() {
@Override
public void run() {
close();
}
};
private PDUReaderWorker(final int pduProcessorDegree, final int queueCapacity) {
super("PDUReaderWorker-" + getSessionId());
pduExecutor = new ThreadPoolExecutor(pduProcessorDegree, pduProcessorDegree,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue(queueCapacity), new RejectedExecutionHandler() {
@Override
public void rejectedExecution(final Runnable r, final ThreadPoolExecutor executor) {
throw new QueueMaxException("Queue capacity " + queueCapacity + " exceeded");
}
});
}
@Override
public void run() {
logger.info("Starting PDUReaderWorker");
while (isReadPdu()) {
readPDU();
}
close();
pduExecutor.shutdown();
try {
pduExecutor.awaitTermination(getTransactionTimer(), TimeUnit.MILLISECONDS);
}
catch (InterruptedException e) {
logger.warn("Interrupted while waiting for PDU executor pool to finish");
Thread.currentThread().interrupt();
}
logger.debug("{} stopped", getName());
}
private void readPDU() {
Command pduHeader = null;
try {
pduHeader = pduReader.readPDUHeader(in);
byte[] pdu = pduReader.readPDU(in, pduHeader);
/*
* When the processing PDU is need user interaction via event,
* the code on event might take non-short time, so we need to
* process it concurrently.
*/
PDUProcessOutboundTask task = new PDUProcessOutboundTask(pduHeader, pdu,
sessionContext, responseHandler,
sessionContext, onIOExceptionTask);
pduExecutor.execute(task);
} catch (QueueMaxException e) {
logger.info("Notify other side to throttle: {} ({} threads active)", e.getMessage(), pduExecutor.getActiveCount());
try {
responseHandler.sendNegativeResponse(pduHeader.getCommandId(), SMPPConstant.STAT_ESME_RTHROTTLED, pduHeader.getSequenceNumber());
} catch (IOException ioe) {
logger.warn("Failed sending negative response: {}", ioe.getMessage());
close();
}
}
catch (InvalidCommandLengthException e) {
logger.warn("Received invalid command length: {}", e.getMessage());
try {
pduSender().sendGenericNack(out, SMPPConstant.STAT_ESME_RINVCMDLEN, 0);
}
catch (IOException ee) {
logger.warn("Failed sending generic nack", ee);
}
unbindAndClose();
}
catch (SocketTimeoutException e) {
notifyNoActivity();
}
catch (IOException e) {
logger.info("Reading PDU session {} in state {}: {}", getSessionId(), getSessionState(), e.getMessage());
close();
}
catch (RuntimeException e) {
logger.warn("Runtime error while reading", e);
close();
}
}
/**
* Notify for no activity.
*/
private void notifyNoActivity() {
logger.debug("No activity notified, sending enquireLink");
if (sessionContext().getSessionState().isBound()) {
enquireLinkSender.enquireLink();
}
}
}
/**
* Session state listener for internal class use.
*
* @author uudashr
*/
private class BoundSessionStateListener implements SessionStateListener {
@Override
public void onStateChange(SessionState newState, SessionState oldState,
Session source) {
/**
* We need to set SO_TIMEOUT to sessionTimer so when timeout occur,
* a SocketTimeoutException will be raised. When Exception raised we
* can send an enquireLinkCommand.
*/
if (newState.isBound()) {
try {
conn.setSoTimeout(getEnquireLinkTimer());
}
catch (IOException e) {
logger.error("Failed setting so_timeout for session timer", e);
}
logger.info("Changing processor degree to {}", getPduProcessorDegree());
pduReaderWorker.pduExecutor.setMaximumPoolSize(getPduProcessorDegree());
pduReaderWorker.pduExecutor.setCorePoolSize(getPduProcessorDegree());
}
}
}
}
