I have implemented the two classes shown at http://tomcat.apache.org/tomcat-6.0-doc/aio.html which gives a messenger application using Tomcat's comet implementation.
How do I connect this to a web interface and get something to display.
I am thinking these are the basic steps (I don't know the details).
I should create some traditional event - a button click or AJAX event - that calls the ChatServlet and passes in a CometEvent (somehow) - perhaps BEGIN
From then I have my code call the event method every time I want to send something to the client using the READ event as the input parameter.
I have copied the two classes below:
package controller;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.CometEvent;
import org.apache.catalina.CometProcessor;
public class ChatServlet extends HttpServlet implements CometProcessor {
protected ArrayList<HttpServletResponse> connections = new ArrayList<HttpServletResponse>();
protected MessageSender messageSender = null;
public void init() throws ServletException {
messageSender = new MessageSender();
Thread messageSenderThread = new Thread(messageSender, "MessageSender["
+ getServletContext().getContextPath() + "]");
messageSenderThread.setDaemon(true);
messageSenderThread.start();
}
public void destroy() {
connections.clear();
messageSender.stop();
messageSender = null;
}
/**
* Process the given Comet event.
*
* #param event
* The Comet event that will be processed
* #throws IOException
* #throws ServletException
*/
public void event(CometEvent event) throws IOException, ServletException {
HttpServletRequest request = event.getHttpServletRequest();
HttpServletResponse response = event.getHttpServletResponse();
if (event.getEventType() == CometEvent.EventType.BEGIN) {
log("Begin for session: " + request.getSession(true).getId());
PrintWriter writer = response.getWriter();
writer
.println("<!doctype html public \"-//w3c//dtd html 4.0 transitional//en\">");
writer
.println("<head><title>JSP Chat</title></head><body bgcolor=\"#FFFFFF\">");
writer.flush();
synchronized (connections) {
connections.add(response);
}
} else if (event.getEventType() == CometEvent.EventType.ERROR) {
log("Error for session: " + request.getSession(true).getId());
synchronized (connections) {
connections.remove(response);
}
event.close();
} else if (event.getEventType() == CometEvent.EventType.END) {
log("End for session: " + request.getSession(true).getId());
synchronized (connections) {
connections.remove(response);
}
PrintWriter writer = response.getWriter();
writer.println("</body></html>");
event.close();
} else if (event.getEventType() == CometEvent.EventType.READ) {
InputStream is = request.getInputStream();
byte[] buf = new byte[512];
do {
int n = is.read(buf); // can throw an IOException
if (n > 0) {
log("Read " + n + " bytes: " + new String(buf, 0, n)
+ " for session: "
+ request.getSession(true).getId());
} else if (n < 0) {
// error(event, request, response);
System.out.println("you have an error");
return;
}
} while (is.available() > 0);
}
}
}
package controller;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.http.HttpServletResponse;
public class MessageSender implements Runnable {
protected boolean running = true;
protected ArrayList<String> messages = new ArrayList<String>();
protected ArrayList<HttpServletResponse> connections = new ArrayList<HttpServletResponse>();
public MessageSender() {
}
public void stop() {
running = false;
}
/**
* Add message for sending.
*/
public void send(String user, String message) {
synchronized (messages) {
messages.add("[" + user + "]: " + message);
messages.notify();
}
}
public void run() {
while (running) {
if (messages.size() == 0) {
try {
synchronized (messages) {
messages.wait();
}
} catch (InterruptedException e) {
// Ignore
}
}
synchronized (connections) {
String[] pendingMessages = null;
synchronized (messages) {
pendingMessages = messages.toArray(new String[0]);
messages.clear();
}
// Send any pending message on all the open connections
for (int i = 0; i < connections.size(); i++) {
try {
PrintWriter writer = connections.get(i).getWriter();
for (int j = 0; j < pendingMessages.length; j++) {
writer.println(pendingMessages[j] + "<br>");
}
writer.flush();
} catch (IOException e) {
System.out.println("IOExeption sending message" + e);
}
}
}
}
}
}
Here you have a complete example for Tomcat with source code to download at the bottom:Developing with Comet and Java
Related
Hello
I try copy folder assets to external directory but getting permition error from android 11 (Api30).
But Its working well when copy or create folder to internal storage.
please help how to fix.
This is error code;
/com.strong.choosedirectory E/Tag: /storage/0E1A-2619/CTV_USB_EU/channel_list_sub.bin: open failed: EPERM (Operation not permitted)
This is main_activity code;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.krunal.choosedirectory.R;
import com.krunal.choosedirectory.databinding.ActivityMainBinding;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import pub.devrel.easypermissions.EasyPermissions;
import static com.krunal.choosedirectory.ClsGlobal.ClsGlobal.SELECT_DIRECTORY;
import static com.krunal.choosedirectory.ClsGlobal.ClsGlobal.requestPermission;
public class MainActivity extends AppCompatActivity {
private ActivityMainBinding binding;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = ActivityMainBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
requestPermission(MainActivity.this);
binding.btnSelectDirectory.setOnClickListener(v -> {
Intent i = new Intent(this, SelectDirectoryActivity.class);
startActivityForResult(i, SELECT_DIRECTORY);
});
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// Forward results to EasyPermissions
EasyPermissions.onRequestPermissionsResult(requestCode,
permissions, grantResults, this);
}
#Override
public void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
if (requestCode == SELECT_DIRECTORY && data != null) {
if (data != null) {
new File(data.getStringExtra("SelectedPath") + "/CTV_USB_EU/").mkdirs();
/////
requestPermission(MainActivity.this);
/////
binding.tvDrSelected.setText(data.getStringExtra("SelectedPath"));
// out = new FileOutputStream("".toString() + (data.getStringExtra("SelectedPath")) + fileName);
}
}
super.onActivityResult(requestCode, resultCode, data);
Button buton = (Button) findViewById(R.id.buton);
buton.setOnClickListener(new View.OnClickListener() { //butona tıklandığı an yapılacaklar
#Override
public void onClick(View view) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("test tiklama calisti")
.setMessage("Seçilen USB Aygıtı " + (data.getStringExtra("SelectedPath")))
.setPositiveButton("Tamam", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Tamam butonuna basılınca yapılacak olanlar
AssetManager assetManager = getAssets();
String[] files = null;
try {
files = assetManager.list("Files");
} catch (Exception e) {
Log.e("Tag", e.getMessage());
}
for (String fileName : files) {
System.out.println("Files=>" + fileName);
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open("Files/" + fileName);
out = new FileOutputStream("".toString() + "/" + (data.getStringExtra("SelectedPath")) + "/CTV_USB_EU/" + fileName);
copyFiles(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
Log.e("Tag", e.getMessage());
}
}
// copyAssets();
}
})
.setNegativeButton("İptal", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// İptal butonuna basınca yapılacak olanlar
}
})
.show();
String isim;
isim = ("".toString() + (data.getStringExtra("SelectedPath")));
System.out.println((isim));
}
});
}
private void copyFiles (InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
public void mkDir (String args[])
{
// create an abstract pathname (File object)
File f = new File(toString(), "File");
// check if the directory can be created
// using the abstract path name
if (f.mkdir()) {
Log.d("BG", "Mkdir return: " );
// display that the directory is created
// as the function returned true
System.out.println("Directory is created");
} else {
// display that the directory cannot be created
// as the function returned false
System.out.println("Directory cannot be created");
}
}
}
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I'm working on a micro-services monitoring app.
My app supposes to update a GUI accordingly when receiving a new consumed
record, meaning:
When I receive a new record:
1)I check if the request it represents is a part of a legal flow, and
if that flow already has representation in the GUI.
By representation, I mean a set of circles that represent the full flow.
For example, if I get a transaction (MS1 received request) a legal flow num 1: that is MS1 to MS2 to MS3, so my GUI will add a table column with 2 grey circles: MS1 to MS2 and MS2 to MS3. Next, when a record: MS2 received from
MS1 is consumed I will paint the first circle green and so on.
My problem is:
I don't understand how to "tap into" Amazon's KCL code (presented here).
meaning, I don't know how to make that a consumed record will trigger event in my JavaFX GUI that will update the GUI accordingly.
Help would be much appreciated!
package com.kinesisdataconsumer;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import com.DATA_STATUS;
import com.DataBase;
import com.MonitoringLogicImpl;
import com.kinesisdataproducer.Producer;
import com.Transaction;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessor;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorCheckpointer;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorFactory;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.KinesisClientLibConfiguration;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.Worker;
import com.amazonaws.services.kinesis.clientlibrary.lib.worker.ShutdownReason;
import com.amazonaws.services.kinesis.model.Record;
public class Consumer implements IRecordProcessorFactory {
private static final Logger log = LoggerFactory.getLogger(Consumer.class);
public DataBase dataBase;
public ArrayList<Transaction> transactionList;
public MonitoringLogicImpl monitoringLogic;
private final AtomicLong largestTimestamp = new AtomicLong(0);
private final List<Long> sequenceNumbers = new ArrayList<>();
private final Object lock = new Object();
public Consumer(DataBase database, ArrayList<Transaction> transactions, MonitoringLogicImpl monitoringLogicImplementation){
dataBase = database;
transactionList = transactions;
monitoringLogic = monitoringLogicImplementation;
}
private class RecordProcessor implements IRecordProcessor {
#Override
public void initialize(String shardId) {}
#Override
public void processRecords(List<Record> records, IRecordProcessorCheckpointer checkpointer) {
long timestamp = 0;
List<Long> seqNos = new ArrayList<>();
for (Record r : records) {
timestamp = Math.max(timestamp, Long.parseLong(r.getPartitionKey()));
try {
byte[] b = new byte[r.getData().remaining()];
r.getData().get(b);
seqNos.add(Long.parseLong(new String(b, "UTF-8").split("#")[0]));
//this thread adds the transaction to the DB
Thread addTransactionToDBThread = new Thread() {
public void run() {
try {
JSONObject jsonObj = new JSONObject(new String(b, "UTF-8").split("#")[1]);
Transaction transaction = Transaction.convertJsonToTransaction(jsonObj);
//add the transaction to the database
dataBase.addTransactionToDB(transaction);
//update the user-interface about the last transaction in the system
DATA_STATUS transactionStatus = monitoringLogic.getStatus(transaction);
monitoringLogic.updateUI(transaction.getUuid(), transaction.getSender(), transaction.getReceiver(), transactionStatus);
Thread.sleep(1000);
} catch(InterruptedException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
};
addTransactionToDBThread.start();
} catch (Exception e) {
log.error("Error parsing record", e);
System.exit(1);
}
}
synchronized (lock) {
if (largestTimestamp.get() < timestamp) {
log.info(String.format(
"Found new larger timestamp: %d (was %d), clearing state",
timestamp, largestTimestamp.get()));
largestTimestamp.set(timestamp);
sequenceNumbers.clear();
}
// Only add to the shared list if our data is from the latest run.
if (largestTimestamp.get() == timestamp) {
sequenceNumbers.addAll(seqNos);
Collections.sort(sequenceNumbers);
}
}
try {
checkpointer.checkpoint();
} catch (Exception e) {
log.error("Error while trying to checkpoint during ProcessRecords", e);
}
}
#Override
public void shutdown(IRecordProcessorCheckpointer checkpointer, ShutdownReason reason) {
log.info("Shutting down, reason: " + reason);
try {
checkpointer.checkpoint();
} catch (Exception e) {
log.error("Error while trying to checkpoint during Shutdown", e);
}
}
}
/**
* Log a message indicating the current state.
*/
public void logResults() {
synchronized (lock) {
if (largestTimestamp.get() == 0) {
return;
}
if (sequenceNumbers.size() == 0) {
log.info("No sequence numbers found for current run.");
return;
}
// The producer assigns sequence numbers starting from 1, so we
// start counting from one before that, i.e. 0.
long last = 0;
long gaps = 0;
for (long sn : sequenceNumbers) {
if (sn - last > 1) {
gaps++;
}
last = sn;
}
log.info(String.format(
"Found %d gaps in the sequence numbers. Lowest seen so far is %d, highest is %d",
gaps, sequenceNumbers.get(0), sequenceNumbers.get(sequenceNumbers.size() - 1)));
}
}
#Override
public IRecordProcessor createProcessor() {
return this.new RecordProcessor();
}
public void consumeData() {
KinesisClientLibConfiguration config =
new KinesisClientLibConfiguration(
"KinesisProducerLibSampleConsumer",
Producer.STREAM_NAME,
new DefaultAWSCredentialsProviderChain(),
"KinesisProducerLibSampleConsumer")
.withRegionName(Producer.REGION)
.withInitialPositionInStream(InitialPositionInStream.LATEST);
final Consumer consumer = new Consumer(dataBase, transactionList, monitoringLogic);
Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable() {
#Override
public void run() {
consumer.logResults();
}
}, 10, 1, TimeUnit.SECONDS);
new Worker.Builder()
.recordProcessorFactory(consumer)
.config(config)
.build()
.run();
}
}
Does somebody implemented confluent-kafka messages deserializer to consume kafka messages by spring "#KafkaListener"-s ?
Here is my answer, which I've implemented based on: "io.confluent.kafka.serializers.AbstractKafkaAvroDeserializer"
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Map;
import javax.xml.bind.DatatypeConverter;
import org.apache.avro.Schema;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.DecoderFactory;
import org.apache.avro.specific.SpecificDatumReader;
import org.apache.avro.specific.SpecificRecordBase;
import org.apache.kafka.common.errors.SerializationException;
import org.apache.kafka.common.serialization.Deserializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AvroConfluentDeserializer<T extends SpecificRecordBase> implements Deserializer<T> {
private static final Logger LOG = LoggerFactory.getLogger(AvroConfluentDeserializer.class);
protected static final byte MAGIC_BYTE = 0x0;
protected static final int idSize = 4;
private final DecoderFactory decoderFactory = DecoderFactory.get();
protected final Class<T> targetType;
public AvroConfluentDeserializer(Class<T> targetType) {
this.targetType = targetType;
}
#Override
public void close() {
// No-op
}
#Override
public void configure(Map<String, ?> arg0, boolean arg1) {
// No-op
}
#Override
public T deserialize(String topic, byte[] data) {
try {
T result = null;
if (data != null) {
LOG.info("data='{}'", DatatypeConverter.printHexBinary(data));
result = (T) deserializePayload(data, targetType.newInstance().getSchema());
LOG.info("deserialized data='{}'", result);
}
return result;
} catch (Exception ex) {
throw new SerializationException(
"Can't deserialize data '" + Arrays.toString(data) + "' from topic '" + topic + "'", ex);
}
}
protected T deserializePayload(byte[] payload, Schema schema) throws SerializationException {
int id = -1;
try {
ByteBuffer buffer = getByteBuffer(payload);
id = buffer.getInt();
int length = buffer.limit() - 1 - idSize;
int start = buffer.position() + buffer.arrayOffset();
DatumReader<T> reader = new SpecificDatumReader<T>(schema);
return reader.read(null, decoderFactory.binaryDecoder(buffer.array(), start, length, null));
} catch (IOException | RuntimeException e) {
throw new SerializationException("Error deserializing Avro message for id " + id, e);
}
}
private ByteBuffer getByteBuffer(byte[] payload) {
ByteBuffer buffer = ByteBuffer.wrap(payload);
if (buffer.get() != MAGIC_BYTE) {
throw new SerializationException("Unknown magic byte!");
}
return buffer;
}
}
Can you please tell me how to use SubethaSmtp library?
<dependency>
<groupId>org.subethamail</groupId>
<artifactId>subethasmtp</artifactId>
<version>3.1.7</version>
<scope>test</scope>
</dependency>
I just want to listen to the emails on a port number from my Gmail/outlook inbox and display them in console window/log them in text file/DB.
I studied most of the API doc but I'm not being able to put the pieces together to get the things working.
Can you please tell me about a working example in spring-boot?
Here is my code below so far
package emailbox;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Service;
import org.subethamail.smtp.helper.SimpleMessageListenerAdapter;
import org.subethamail.smtp.server.SMTPServer;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
#SuppressWarnings("restriction")
#PropertySource("/emailbox.properties")
#Service
public class SMTPServerService {
#Value("${smtpserver.enabled}")
String enabled="";
#Value("${smtpserver.hostName}")
String hostName="";
#Value("${smtpserver.port}")
String port="";
SMTPServer smtpServer;
public SMTPServerService() {
}
#PostConstruct
public void start() {
if(enabled.equalsIgnoreCase("true"))
{
SimpleMessageListenerImpl l = new SimpleMessageListenerImpl();
smtpServer = new SMTPServer(new SimpleMessageListenerAdapter(l));
smtpServer.setHostName(this.hostName);
smtpServer.setPort(Integer.valueOf(port));
smtpServer.start();
System.out.println("****** SMTP Server is running for domain "+smtpServer.getHostName()+" on port "+smtpServer.getPort());
} else {
System.out.println("****** SMTP Server NOT ENABLED by settings ");
}
}
#PreDestroy
public void stop() {
if(enabled.equalsIgnoreCase("true")){
System.out.println("****** Stopping SMTP Server for domain "+smtpServer.getHostName()+" on port "+smtpServer.getPort());
smtpServer.stop();
}
}
public boolean isRunning() {
return smtpServer.isRunning();
}
}
package emailbox;
import java.io.InputStream;
import java.util.Properties;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import org.subethamail.smtp.helper.SimpleMessageListener;
public class SimpleMessageListenerImpl implements SimpleMessageListener {
public SimpleMessageListenerImpl() {
}
#Override
public boolean accept(String from, String recipient) {
return true;
}
#Override
public void deliver(String from, String recipient, InputStream data) {
Session session = Session.getDefaultInstance(new Properties());
MimeMessage m = new MimeMessage(session,data);
ReceivedEmail email=new ReceivedEmail(m);
// ... here we go with email message ...
}
}
Subetha SMTP is used for building an SMTP Server.
You should be using POP or IMAP for this purpose to read emails from your inbox.
Please see the example below: You just need java mail api.
public void receiveMail(){
Properties props = System.getProperties();
props.setProperty("mail.store.protocol", "imap");
props.put("mail.imap.host", host);
props.put("mail.imap.port", port);
props.put("mail.imap.auth.login.disable", "true");
props.put("mail.imap.auth.plain.disable", "false");
//props.put("mail.imap.ssl.enable", "true");
props.put("mail.debug", "true");
props.put("mail.debug.auth", "true");
Session session = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, pwd);
}
});
store = (IMAPStore) session.getStore("imap");
store.connect(host, user, pwd);
folder = (IMAPFolder) store.getFolder("INBOX");
openFolder(folder);
}
public static void openFolder(IMAPFolder folder) throws MessagingException, IOException{
String subject = null;
if (!folder.isOpen())
folder.open(Folder.READ_WRITE);
Message[] messages = folder.getMessages();
System.out.println("No of Messages : " + folder.getMessageCount());
System.out.println("No of Unread Messages : " + folder.getUnreadMessageCount());
System.out.println(messages.length);
if (messages.length > 0) {
for (int i = 0; i < 1; i++) {
System.out.println("*****************************************************************************");
System.out.println("MESSAGE " + (i + 1) + ":");
Message msg = messages[i];
System.out.println("Message Number: " + msg.getMessageNumber());
// Object String;
System.out.println("UID: " + folder.getUID(msg));
subject = msg.getSubject();
System.out.println("Subject: " + subject);
System.out.println("From: " + msg.getFrom()[0]);
System.out.println("To: " + msg.getAllRecipients()[0]);
System.out.println("Date: " + msg.getReceivedDate());
System.out.println("Size: " + msg.getSize());
System.out.println(msg.getFlags());
System.out.println("Body: \n" + msg.getContent());
System.out.println(msg.getContentType());
}
}
}
A full example of receiving emails with SubEtha SMTP (and maybe if you're using Spring Boot also) is available here
I would like to modify an outgoing SOAP Request.
I would like to remove 2 xml nodes from the Envelope's body.
I managed to set up an Interceptor and get the generated String value of the message set to the endpoint.
However, the following code does not seem to work as the outgoing message is not edited as expected. Does anyone have some code or ideas on how to do this?
public class MyOutInterceptor extends AbstractSoapInterceptor {
public MyOutInterceptor() {
super(Phase.SEND);
}
public void handleMessage(SoapMessage message) throws Fault {
// Get message content for dirty editing...
StringWriter writer = new StringWriter();
CachedOutputStream cos = (CachedOutputStream)message.getContent(OutputStream.class);
InputStream inputStream = cos.getInputStream();
IOUtils.copy(inputStream, writer, "UTF-8");
String content = writer.toString();
// remove the substrings from envelope...
content = content.replace("<idJustification>0</idJustification>", "");
content = content.replace("<indicRdv>false</indicRdv>", "");
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
outputStream.write(content.getBytes(Charset.forName("UTF-8")));
message.setContent(OutputStream.class, outputStream);
}
Based on the first comment, I created an abstract class which can easily be used to change the whole soap envelope.
Just in case someone wants a ready-to-use code part.
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.io.IOUtils;
import org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.apache.log4j.Logger;
/**
* http://www.mastertheboss.com/jboss-web-services/apache-cxf-interceptors
* http://stackoverflow.com/questions/6915428/how-to-modify-the-raw-xml-message-of-an-outbound-cxf-request
*
*/
public abstract class MessageChangeInterceptor extends AbstractPhaseInterceptor<Message> {
public MessageChangeInterceptor() {
super(Phase.PRE_STREAM);
addBefore(SoapPreProtocolOutInterceptor.class.getName());
}
protected abstract Logger getLogger();
protected abstract String changeOutboundMessage(String currentEnvelope);
protected abstract String changeInboundMessage(String currentEnvelope);
public void handleMessage(Message message) {
boolean isOutbound = false;
isOutbound = message == message.getExchange().getOutMessage()
|| message == message.getExchange().getOutFaultMessage();
if (isOutbound) {
OutputStream os = message.getContent(OutputStream.class);
CachedStream cs = new CachedStream();
message.setContent(OutputStream.class, cs);
message.getInterceptorChain().doIntercept(message);
try {
cs.flush();
IOUtils.closeQuietly(cs);
CachedOutputStream csnew = (CachedOutputStream) message.getContent(OutputStream.class);
String currentEnvelopeMessage = IOUtils.toString(csnew.getInputStream(), "UTF-8");
csnew.flush();
IOUtils.closeQuietly(csnew);
if (getLogger().isDebugEnabled()) {
getLogger().debug("Outbound message: " + currentEnvelopeMessage);
}
String res = changeOutboundMessage(currentEnvelopeMessage);
if (res != null) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Outbound message has been changed: " + res);
}
}
res = res != null ? res : currentEnvelopeMessage;
InputStream replaceInStream = IOUtils.toInputStream(res, "UTF-8");
IOUtils.copy(replaceInStream, os);
replaceInStream.close();
IOUtils.closeQuietly(replaceInStream);
os.flush();
message.setContent(OutputStream.class, os);
IOUtils.closeQuietly(os);
} catch (IOException ioe) {
getLogger().warn("Unable to perform change.", ioe);
throw new RuntimeException(ioe);
}
} else {
try {
InputStream is = message.getContent(InputStream.class);
String currentEnvelopeMessage = IOUtils.toString(is, "UTF-8");
IOUtils.closeQuietly(is);
if (getLogger().isDebugEnabled()) {
getLogger().debug("Inbound message: " + currentEnvelopeMessage);
}
String res = changeInboundMessage(currentEnvelopeMessage);
if (res != null) {
if (getLogger().isDebugEnabled()) {
getLogger().debug("Inbound message has been changed: " + res);
}
}
res = res != null ? res : currentEnvelopeMessage;
is = IOUtils.toInputStream(res, "UTF-8");
message.setContent(InputStream.class, is);
IOUtils.closeQuietly(is);
} catch (IOException ioe) {
getLogger().warn("Unable to perform change.", ioe);
throw new RuntimeException(ioe);
}
}
}
public void handleFault(Message message) {
}
private class CachedStream extends CachedOutputStream {
public CachedStream() {
super();
}
protected void doFlush() throws IOException {
currentStream.flush();
}
protected void doClose() throws IOException {
}
protected void onWrite() throws IOException {
}
}
}
I had this problem as well today. After much weeping and gnashing of teeth, I was able to alter the StreamInterceptor class in the configuration_interceptor demo that comes with the CXF source:
OutputStream os = message.getContent(OutputStream.class);
CachedStream cs = new CachedStream();
message.setContent(OutputStream.class, cs);
message.getInterceptorChain().doIntercept(message);
try {
cs.flush();
CachedOutputStream csnew = (CachedOutputStream) message.getContent(OutputStream.class);
String soapMessage = IOUtils.toString(csnew.getInputStream());
...
The soapMessage variable will contain the complete SOAP message. You should be able to manipulate the soap message, flush it to an output stream and do a message.setContent(OutputStream.class... call to put your modifications on the message. This comes with no warranty, since I'm pretty new to CXF myself!
Note: CachedStream is a private class in the StreamInterceptor class. Don't forget to configure your interceptor to run in the PRE_STREAM phase so that the SOAP interceptors have a chance to write the SOAP message.
Following is able to bubble up server side exceptions. Use of os.close() instead of IOUtils.closeQuietly(os) in previous solution is also able to bubble up exceptions.
public class OutInterceptor extends AbstractPhaseInterceptor<Message> {
public OutInterceptor() {
super(Phase.PRE_STREAM);
addBefore(StaxOutInterceptor.class.getName());
}
public void handleMessage(Message message) {
OutputStream os = message.getContent(OutputStream.class);
CachedOutputStream cos = new CachedOutputStream();
message.setContent(OutputStream.class, cos);
message.getInterceptorChain.aad(new PDWSOutMessageChangingInterceptor(os));
}
}
public class OutMessageChangingInterceptor extends AbstractPhaseInterceptor<Message> {
private OutputStream os;
public OutMessageChangingInterceptor(OutputStream os){
super(Phase.PRE_STREAM_ENDING);
addAfter(StaxOutEndingInterceptor.class.getName());
this.os = os;
}
public void handleMessage(Message message) {
try {
CachedOutputStream csnew = (CachedOutputStream) message .getContent(OutputStream.class);
String currentEnvelopeMessage = IOUtils.toString( csnew.getInputStream(), (String) message.get(Message.ENCODING));
csnew.flush();
IOUtils.closeQuietly(csnew);
String res = changeOutboundMessage(currentEnvelopeMessage);
res = res != null ? res : currentEnvelopeMessage;
InputStream replaceInStream = IOUtils.tolnputStream(res, (String) message.get(Message.ENCODING));
IOUtils.copy(replaceInStream, os);
replaceInStream.close();
IOUtils.closeQuietly(replaceInStream);
message.setContent(OutputStream.class, os);
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
}
Good example for replacing outbound soap content based on this
package kz.bee.bip;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.io.IOUtils;
import org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
public class SOAPOutboundInterceptor extends AbstractPhaseInterceptor<Message> {
public SOAPOutboundInterceptor() {
super(Phase.PRE_STREAM);
addBefore(SoapPreProtocolOutInterceptor.class.getName());
}
public void handleMessage(Message message) {
boolean isOutbound = false;
isOutbound = message == message.getExchange().getOutMessage()
|| message == message.getExchange().getOutFaultMessage();
if (isOutbound) {
OutputStream os = message.getContent(OutputStream.class);
CachedStream cs = new CachedStream();
message.setContent(OutputStream.class, cs);
message.getInterceptorChain().doIntercept(message);
try {
cs.flush();
IOUtils.closeQuietly(cs);
CachedOutputStream csnew = (CachedOutputStream) message.getContent(OutputStream.class);
String currentEnvelopeMessage = IOUtils.toString(csnew.getInputStream(), "UTF-8");
csnew.flush();
IOUtils.closeQuietly(csnew);
/* here we can set new data instead of currentEnvelopeMessage*/
InputStream replaceInStream = IOUtils.toInputStream(currentEnvelopeMessage, "UTF-8");
IOUtils.copy(replaceInStream, os);
replaceInStream.close();
IOUtils.closeQuietly(replaceInStream);
os.flush();
message.setContent(OutputStream.class, os);
IOUtils.closeQuietly(os);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
public void handleFault(Message message) {
}
private static class CachedStream extends CachedOutputStream {
public CachedStream() {
super();
}
protected void doFlush() throws IOException {
currentStream.flush();
}
protected void doClose() throws IOException {
}
protected void onWrite() throws IOException {
}
}
}
a better way would be to modify the message using the DOM interface, you need to add the SAAJOutInterceptor first (this might have a performance hit for big requests) and then your custom interceptor that is executed in phase USER_PROTOCOL
import org.apache.cxf.binding.soap.SoapMessage;
import org.apache.cxf.binding.soap.interceptor.AbstractSoapInterceptor;
import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.phase.Phase;
import org.w3c.dom.Node;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
abstract public class SoapNodeModifierInterceptor extends AbstractSoapInterceptor {
SoapNodeModifierInterceptor() { super(Phase.USER_PROTOCOL); }
#Override public void handleMessage(SoapMessage message) throws Fault {
try {
if (message == null) {
return;
}
SOAPMessage sm = message.getContent(SOAPMessage.class);
if (sm == null) {
throw new RuntimeException("You must add the SAAJOutInterceptor to the chain");
}
modifyNodes(sm.getSOAPBody());
} catch (SOAPException e) {
throw new RuntimeException(e);
}
}
abstract void modifyNodes(Node node);
}
this one's working for me. It's based on StreamInterceptor class from configuration_interceptor example in Apache CXF samples.
It's in Scala instead of Java but the conversion is straightforward.
I tried to add comments to explain what's happening (as far as I understand).
import java.io.OutputStream
import org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor
import org.apache.cxf.helpers.IOUtils
import org.apache.cxf.io.CachedOutputStream
import org.apache.cxf.message.Message
import org.apache.cxf.phase.AbstractPhaseInterceptor
import org.apache.cxf.phase.Phase
// java note: base constructor call is hidden at the end of class declaration
class StreamInterceptor() extends AbstractPhaseInterceptor[Message](Phase.PRE_STREAM) {
// java note: put this into the constructor after calling super(Phase.PRE_STREAM);
addBefore(classOf[SoapPreProtocolOutInterceptor].getName)
override def handleMessage(message: Message) = {
// get original output stream
val osOrig = message.getContent(classOf[OutputStream])
// our output stream
val osNew = new CachedOutputStream
// replace it with ours
message.setContent(classOf[OutputStream], osNew)
// fills the osNew instead of osOrig
message.getInterceptorChain.doIntercept(message)
// flush before getting content
osNew.flush()
// get filled content
val content = IOUtils.toString(osNew.getInputStream, "UTF-8")
// we got the content, we may close our output stream now
osNew.close()
// modified content
val modifiedContent = content.replace("a-string", "another-string")
// fill original output stream
osOrig.write(modifiedContent.getBytes("UTF-8"))
// flush before set
osOrig.flush()
// replace with original output stream filled with our modified content
message.setContent(classOf[OutputStream], osOrig)
}
}