I tried make a simple implementation of using Kura DataService
Here is the java class I made LampuPintar.java
package org.eclipse.kura.smarthome.lampupintar;
import org.eclipse.kura.data.DataService;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class LampuPintar {
private DataService m_dataservice;
private static final Logger s_logger = LoggerFactory.getLogger(LampuPintar.class);
private static final String APP_ID = "lampupintar";
public void setDataService(DataService dataService){
m_dataservice = dataService;
}
public void unsetDataService(DataService dataService){
m_dataservice = null;
}
protected void activate(ComponentContext componentContext) {
s_logger.info("Bundle " + APP_ID + " has started!");
s_logger.debug(APP_ID + ": This is a debug message.");
}
protected void deactivate(ComponentContext componentContext) {
s_logger.info("Bundle " + APP_ID + " has stopped!");
}
public void publish() {
String topic = "smarthome/lampupintar";
String payload = "Hello";
int qos = 2;
boolean retain = false;
for (int i=0; i<20;i++){
try {
m_dataservice.publish(topic, payload.getBytes(), qos, retain, 2);
s_logger.info("Publish ok");
} catch (Exception e) {
s_logger.error("Error while publishing", e);
}
}
}
}
and this is the component definition file, component.xml
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0"
activate="activate" deactivate="deactivate"
name="org.eclipse.kura.smarthome.lampupintar">
<implementation class="org.eclipse.kura.smarthome.lampupintar.LampuPintar"/>
<reference bind="setDataService"
cardinality="1..1"
interface="org.eclipse.kura.data.DataService"
name="DataService"
policy="static"
unbind="unsetDataService"/>
</scr:component>
I tried make a project with those files, I successfully created the .dp file and installed it to Kura Web UI, but it seems showed nothing and not send anything to the broker (I checked in the mosquitto broker console).
What's wrong with those codes ?? or something miss from those code to make it complete and work properly ??
Thanks.
Have you checked the log files (/var/log/kura.log and /var/log/kura-console.log)? Are you seeing your "Publish ok" message in the log? You can also check your bundle with the OSGi console (telnet localhost 5002) using the 'ss' and 'ls' commands. This will show if the bundle and resolved correctly.
I would also add the DataServiceListener [1]. This will help track events with the DataService.
[1] http://download.eclipse.org/kura/docs/api/3.0.0/apidocs/org/eclipse/kura/data/listener/DataServiceListener.html
Related
Flink can read a socket stream, can it read http requests? how?
// socket example
DataStream<XXX> socketStream = env
.socketTextStream("localhost", 9999)
.map(...);
There's an open JIRA ticket for creating an HTTP sink connector for Flink, but I've seen no discussion about creating a source connector.
Moreover, it's not clear this is a good idea. Flink's approach to fault tolerance requires sources that can be rewound and replayed, so it works best with input sources that behave like message queues. I would suggest buffering the incoming http requests in a distributed log.
For an example, look at how DriveTribe uses Flink to power their website on the data Artisans blog and on YouTube.
I write one custom http source. please ref OneHourHttpTextStreamFunction. you need create a fat jar to include apache httpserver classes if you want run my code.
package org.apache.flink.streaming.examples.http;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.java.utils.ParameterTool;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.source.SourceFunction;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.streaming.examples.socket.SocketWindowWordCount.WordWithCount;
import org.apache.flink.util.Collector;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.bootstrap.HttpServer;
import org.apache.http.impl.bootstrap.ServerBootstrap;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpRequestHandler;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import static org.apache.flink.util.Preconditions.checkArgument;
import static org.apache.flink.util.Preconditions.checkNotNull;
public class HttpRequestCount {
public static void main(String[] args) throws Exception {
// the host and the port to connect to
final String path;
final int port;
try {
final ParameterTool params = ParameterTool.fromArgs(args);
path = params.has("path") ? params.get("path") : "*";
port = params.getInt("port");
} catch (Exception e) {
System.err.println("No port specified. Please run 'SocketWindowWordCount "
+ "--path <hostname> --port <port>', where path (* by default) "
+ "and port is the address of the text server");
System.err.println("To start a simple text server, run 'netcat -l <port>' and "
+ "type the input text into the command line");
return;
}
// get the execution environment
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// get input data by connecting to the socket
DataStream<String> text = env.addSource(new OneHourHttpTextStreamFunction(path, port));
// parse the data, group it, window it, and aggregate the counts
DataStream<WordWithCount> windowCounts = text
.flatMap(new FlatMapFunction<String, WordWithCount>() {
#Override
public void flatMap(String value, Collector<WordWithCount> out) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (String word : value.split("\\s")) {
out.collect(new WordWithCount(word, 1L));
}
}
})
.keyBy("word").timeWindow(Time.seconds(5))
.reduce(new ReduceFunction<WordWithCount>() {
#Override
public WordWithCount reduce(WordWithCount a, WordWithCount b) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return new WordWithCount(a.word, a.count + b.count);
}
});
// print the results with a single thread, rather than in parallel
windowCounts.print().setParallelism(1);
env.execute("Http Request Count");
}
}
class OneHourHttpTextStreamFunction implements SourceFunction<String> {
private static final long serialVersionUID = 1L;
private final String path;
private final int port;
private transient HttpServer server;
public OneHourHttpTextStreamFunction(String path, int port) {
checkArgument(port > 0 && port < 65536, "port is out of range");
this.path = checkNotNull(path, "path must not be null");
this.port = port;
}
#Override
public void run(SourceContext<String> ctx) throws Exception {
server = ServerBootstrap.bootstrap().setListenerPort(port).registerHandler(path, new HttpRequestHandler(){
#Override
public void handle(HttpRequest req, HttpResponse rep, HttpContext context) throws HttpException, IOException {
ctx.collect(req.getRequestLine().getUri());
rep.setStatusCode(200);
rep.setEntity(new StringEntity("OK"));
}
}).create();
server.start();
server.awaitTermination(1, TimeUnit.HOURS);
}
#Override
public void cancel() {
server.stop();
}
}
Leave you comment, if you want the demo jar.
I'm having a huge problem with my java webstart application, I have tries a lot of solutions, but none seems to work correctly in th end.
I need to write a webstart applet to load basic hardware info about the client computer to check if my client can connect on our systems and use the software four our courses. I use Sigar to load the CPU and Memory information and then use JNI to load a custom c++ script that check the graphic card name (This one works perfectly).
I've put all my dlls in src/resources folder to load them in the jar, I also use what we call here "engines" which are classed that do specified operations (In our case, Jni Engine, Config Engine and Data Engine (Code below)), I'm new to webstart so I'm not sure if this concept works well with library loading.
I've tries to add the dlls in a jar as a library in Netbeans, I've tried to add the dlls in the jnlp, but each run recreates it and I can't add them with project properties, finnaly, I've built my Data Engine in a way that should load the dlls in the java temp directory in case they are not there, but Sigar still don't want to work. I've also put my dll in the java.library.path correctly cofigured (As it works in local).
It work when I run my main class locally (With right click-run), but when I click the run button to load the webstart, it crashes with this error message (it happens in ConfigEngine as it extends SigarBase) :
JNLPClassLoader: Finding library sigar-amd64-winnt.dll.dll
no sigar-amd64-winnt.dll in java.library.path
org.hyperic.sigar.SigarException: no sigar-amd64-winnt.dll in java.library.path
Here's the code :
JNi Engine (Loads the c++ code for the graphic card)
package Engine;
public class JniEngine
{
static private final String nomLibJni = "JniEngine";
static private final String nomLibJni64 = "JniEngine_x64";
static
{
if (System.getProperty("os.arch").contains("86"))
{
System.loadLibrary(nomLibJni);
}
else
{
System.loadLibrary(nomLibJni64);
}
}
public native String getInfoGPU() throws Error;
}
ConfigEngine
package Engine;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.cmd.SigarCommandBase;
public class ConfigEngine extends SigarCommandBase
{
private final String nomOsAcceptes = "Windows";
static
{
DataEngine data;
}
public ConfigEngine()
{
super();
}
#Override
public void output(String[] args) throws SigarException
{
}
public HashMap<String, String> getMap() throws SigarException, SocketException
{
HashMap<String, String> hmConfig = new HashMap<>();
loadInfoCpu(hmConfig);
loadInfoRam(hmConfig);
loadInfoOs(hmConfig);
loadInfoNet(hmConfig);
loadInfoGpu(hmConfig);
return hmConfig;
}
private void loadInfoCpu(HashMap<String,String> Hashmap) throws SigarException
{
org.hyperic.sigar.CpuInfo[] configCpu = this.sigar.getCpuInfoList();
org.hyperic.sigar.CpuInfo infoCpu = configCpu[0];
long cacheSize = infoCpu.getCacheSize();
Hashmap.put("Builder", infoCpu.getVendor());
Hashmap.put("Model" , infoCpu.getModel());
Hashmap.put("Mhz", String.valueOf(infoCpu.getMhz()));
Hashmap.put("Cpus nbr", String.valueOf(infoCpu.getTotalCores()));
if ((infoCpu.getTotalCores() != infoCpu.getTotalSockets()) ||
(infoCpu.getCoresPerSocket() > infoCpu.getTotalCores()))
{
Hashmap.put("Cpus", String.valueOf(infoCpu.getTotalSockets()));
Hashmap.put("Core", String.valueOf(infoCpu.getCoresPerSocket()));
}
if (cacheSize != Sigar.FIELD_NOTIMPL) {
Hashmap.put("Cache", String.valueOf(cacheSize));
}
}
private void loadInfoRam(HashMap<String,String> Hashmap) throws SigarException
{
org.hyperic.sigar.Mem mem = this.sigar.getMem();
Hashmap.put("RAM" , String.valueOf(mem.getRam()));
Hashmap.put("Memoery", String.valueOf(mem.getTotal()));
Hashmap.put("Free", String.valueOf(mem.getUsed()));
}
private void loadInfoOs(HashMap<String,String> Hashmap) throws SigarException
{
Hashmap.put("OS", System.getProperty("os.name"));
Hashmap.put("Version", System.getProperty("os.version"));
Hashmap.put("Arch", System.getProperty("os.arch"));
}
private void loadInfoNet(HashMap<String,String> Hashmap) throws SocketException
{
List<NetworkInterface> interfaces = Collections.
list(NetworkInterface.getNetworkInterfaces());
int i = 1;
for (NetworkInterface net : interfaces)
{
if (!net.isVirtual() && net.isUp())
{
Hashmap.put("Port Name " + String.valueOf(i), net.getDisplayName());
}
i++;
}
}
private void loadInfoGpu(HashMap<String,String> Hashmap) throws SocketException
{
if (System.getProperty("os.name").contains(nomOsAcceptes))
{
JniEngine Jni = new JniEngine();
Hashmap.put("VGA", Jni.getInfoGPU());
}
}
}
Finally my Data Engine which tries to load all the dlls and change the library path (Most of it is temporary as it is patches on patches)
package Engine;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
public class DataEngine
{
static private final String nomLibSigar = "sigar-x86-winnt";
static private final String nomLibSigar64 = "sigar-amd64-winnt";
static private final String nomLibJni = "JniEngine";
static private final String nomLibJni64 = "JniEngine_x64";
static private final String NomJar86 = "lib_config_x86";
static private final String nomJar64 = "lib_config_x64";
static private final String path = "Resources\\";
static
{
try
{
if (System.getProperty("os.arch").contains("86"))
{
System.loadLibrary(nomLibJni);
System.loadLibrary(nomLibSigar);
}
else
{
System.loadLibrary(nomLibJni64);
System.loadLibrary(nomLibSigar64);
}
}
catch (UnsatisfiedLinkError ex)
{
loadJniFromJar();
loadSigarFromJar();
}
}
public static void loadSigarFromJar()
{
try
{
File dll;
InputStream is;
if (System.getProperty("os.arch").contains("86"))
{
is = DataEngine.class.getResourceAsStream(
path + nomLibSigar + ".dll");
dll = File.createTempFile(path + nomLibSigar, ".dll");
}
else
{
is = DataEngine.class.getResourceAsStream(
path + nomLibSigar64 + ".dll");
dll = File.createTempFile(path + nomLibSigar64, ".dll");
}
FileOutputStream fos = new FileOutputStream(dll);
byte[] array = new byte[1024];
for (int i = is.read(array);
i != -1;
i = is.read(array))
{
fos.write(array, 0, i);
}
fos.close();
is.close();
System.load(dll.getAbsolutePath());
System.setProperty("java.library.path", dll.getAbsolutePath());
}
catch (Throwable e)
{
}
}
public static void loadJniFromJar()
{
try
{
File dll;
InputStream is;
if (System.getProperty("os.arch").contains("86"))
{
is = DataEngine.class.getResourceAsStream(
path + nomLibJni + ".dll");
dll = File.createTempFile(path + nomLibJni, ".dll");
}
else
{
is = DataEngine.class.getResourceAsStream(
path + nomLibJni64 + ".dll");
dll = File.createTempFile(path + nomLibJni64, ".dll");
}
FileOutputStream fos = new FileOutputStream(dll);
byte[] array = new byte[1024];
for (int i = is.read(array);
i != -1;
i = is.read(array))
{
fos.write(array, 0, i);
}
fos.close();
is.close();
System.load(dll.getAbsolutePath());
}
catch (Throwable e)
{
}
}
}
I also have some problem with my main class (NetBeans don't want my JAppletForm to be the main class of my project, but I'll probably recreate the project anyway since the hundreds of patches I tries have corrupted the build. My main class simply load the HashMap with GetMap of ConfigEngine and show it in the console if local or in the JAppletForm if it runs with webstart.
Its a pretty big problem so I'll update my question with all the info you'll need if asked.
Getting started (Without Maven) I first Installed GEF and Drools 6.0.0 final plugin in eclipse.
and then I created a Drools project which generated the two files below.
DroolsTest.java
package com.sample;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
/**
* This is a sample class to launch a rule.
*/
public class DroolsTest {
public static final void main(String[] args) {
try {
// load up the knowledge base
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-rules");
// go !
Message message = new Message();
message.setMessage("Hello World");
message.setStatus(Message.HELLO);
kSession.insert(message);
kSession.fireAllRules();
} catch (Throwable t) {
t.printStackTrace();
}
}
public static class Message {
public static final int HELLO = 0;
public static final int GOODBYE = 1;
private String message;
private int status;
public String getMessage() {
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
public int getStatus() {
return this.status;
}
public void setStatus(int status) {
this.status = status;
}
}
}
Sample.drl
package com.sample
import com.sample.DroolsTest.Message;
rule "Hello World"
when
m : Message( status == Message.HELLO, myMessage : message )
then
System.out.println( myMessage );
m.setMessage( "Goodbye cruel world" );
m.setStatus( Message.GOODBYE );
update( m );
end
rule "GoodBye"
when
Message( status == Message.GOODBYE, myMessage : message )
then
System.out.println( myMessage );
end
I get NPE at kSession.insert(message); obviously due to missing ksession-rules here
KieSession kSession = kContainer.newKieSession("ksession-rules");
I get the same thing when I mavenize this project and run it as a maven test.
I notice some ppl already experienced this and are point to classpath issue, I am still not clear with the solution though.
mvn eclipse:eclipse did not help either.
Links I went thru already
Getting null pointer exception while running helloworld in drools
Unknown KieSession name in drools 6.0 (while trying to add drools to existing maven/eclipse project)
After going thru Drools 6.0.0 in github, I see a file kModule.xml should be present with session name "ksession-rules" tied to a rule. This file did not get generated (bug??)
I am however downgrading to 5.6.0 to get better community support and good documentation.
my problem is the following:
I have an actionscript class that represents a socketclient. This code works.
In addition to that I have a Main.mxml file with fx:script code (In my original file there is a huge GUI connected, in this case here I made it simple)
So what I want:
I want to call methods when receiving information from the Socket. So I would like to call methods that are in the mxml file from the actionscript class.
As an alternative I want to send events to the mxml file that can be processed there.
I read a lot about import/include stuff and so on, but nothing really helped.
So here is my code:
Actionscript file SocketExample.as:
// http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/Socket.html
package {
import flash.display.Sprite;
public class SocketExample extends Sprite {
private var socket:CustomSocket;
public function SocketExample() {
socket = new CustomSocket("localhost", 80);
}
}
}
import flash.errors.*;
import flash.events.*;
import flash.net.Socket;
class CustomSocket extends Socket {
private var response:String;
public function CustomSocket(host:String = null, port:uint = 0) {
super();
configureListeners();
if (host && port) {
super.connect(host, port);
}
}
private function configureListeners():void {
addEventListener(Event.CLOSE, closeHandler);
addEventListener(Event.CONNECT, connectHandler);
addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
addEventListener(ProgressEvent.SOCKET_DATA, socketDataHandler);
}
private function writeln(str:String):void {
str += "\n";
try {
writeUTFBytes(str);
}
catch(e:IOError) {
trace(e);
}
}
private function sendRequest():void {
trace("sendRequest");
response = "";
writeln("GET /");
flush();
}
private function readResponse():void {
var str:String = readUTFBytes(bytesAvailable);
response += str;
trace(response);
//
// Here I want to call the method
//
}
private function closeHandler(event:Event):void {
trace("closeHandler: " + event);
trace(response.toString());
}
private function connectHandler(event:Event):void {
trace("connectHandler: " + event);
sendRequest();
}
private function ioErrorHandler(event:IOErrorEvent):void {
trace("ioErrorHandler: " + event);
}
private function securityErrorHandler(event:SecurityErrorEvent):void {
trace("securityErrorHandler: " + event);
}
private function socketDataHandler(event:ProgressEvent):void {
trace("socketDataHandler: " + event);
readResponse();
}
}
Here is the Main.mxml file called HelloSocket.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<fx:Script>
<![CDATA[
public function HelloWorld():void{
HelloLabel.text = "Hello World";
}
]]>
</fx:Script>
<s:Label id="HelloLabel" x="150" y="180" text="Hello" fontSize="20" fontWeight="bold"/>
</s:WindowedApplication>
so HelloWorld() is the function I want to call here.
Important is also that GUI and SocketClient (as class) are running at the same time.
This is the complete example code that I have.
Please tell me everything I need to make this example work, beginning from imports and includes, to event handling or method calling
Best would be to change directly my code and explain.
I thank you very much in advance
If you would like to test it, here is a matching java socket server:
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class SocketServer {
public static void main (String args[]) throws IOException {
ServerSocket mySocketServer = new ServerSocket(80);
System.out.print("Waiting for FlashClient ...\n");
Socket mySocket = mySocketServer.accept();
System.out.print("FlashClient connected.\n\n");
mySocketServer.close();
InputStream in = mySocket.getInputStream();
OutputStream out = mySocket.getOutputStream();
byte buffer[] = new byte[1];
int i = 5;
do
{
// i = in.read(buffer, 0, 1);
if (i>-1) out.write("Hello World".getBytes("UTF-8"));
try {
Thread.sleep (300);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} while(i>-1);
System.out.print("Lost connection to FlashClient.\n\n");
in.close();
out.close();
mySocket.close();
}
}
Your mxml files is your main application file. That means that you will have to create an instance of your CustomSocket there and listen for events from it.
Since the relationship from your main application to your socket is top-down, the way the socket communicates with the application is via events and not via direct method invocations. When the data comes in and you want to inform the application from within the socket, dispatch an event.
Thank you Christophe. So here is the solution to my problem.
First, I needed an instance of the actionScript in the script are of my mxml file:
protected var socketEx:SocketExample = new SocketExample();
Then I had to change the methods in my mxml file a bit:
protected function HelloWorld(event:FlexEvent):void
{
socketEx.socket.addEventListener("test", Function1);
}
protected function Function1(e:Event):void{
HelloLabel.text = "World";
}
The HelloWorld method is called on creationComplete
It adds an EventListener. The event is dispatched in my actionScript class:
private function readResponse():void {
var str:String = readUTFBytes(bytesAvailable);
response += str;
trace(response);
this.dispatchEvent(new Event("test"));
}
So to use it here is the complete code now:
SocketExample.as :
// http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/Socket.html
package {
import flash.display.Sprite;
public class SocketExample extends Sprite {
public var socket:CustomSocket;
public function SocketExample() {
socket = new CustomSocket("localhost", 80);
}
}
}
import flash.errors.*;
import flash.events.*;
import flash.net.Socket;
class CustomSocket extends Socket {
public var response:String;
public function CustomSocket(host:String = null, port:uint = 0) {
super();
configureListeners();
if (host && port) {
super.connect(host, port);
}
}
private function configureListeners():void {
addEventListener(Event.CLOSE, closeHandler);
addEventListener(Event.CONNECT, connectHandler);
addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
addEventListener(ProgressEvent.SOCKET_DATA, socketDataHandler);
}
private function writeln(str:String):void {
str += "\n";
try {
writeUTFBytes(str);
}
catch(e:IOError) {
trace(e);
}
}
private function sendRequest():void {
trace("sendRequest");
response = "";
writeln("GET /");
flush();
}
private function readResponse():void {
var str:String = readUTFBytes(bytesAvailable);
response += str;
trace(response);
this.dispatchEvent(new Event("test"));
}
private function closeHandler(event:Event):void {
trace("closeHandler: " + event);
trace(response.toString());
}
private function connectHandler(event:Event):void {
trace("connectHandler: " + event);
sendRequest();
}
private function ioErrorHandler(event:IOErrorEvent):void {
trace("ioErrorHandler: " + event);
}
private function securityErrorHandler(event:SecurityErrorEvent):void {
trace("securityErrorHandler: " + event);
}
private function socketDataHandler(event:ProgressEvent):void {
trace("socketDataHandler: " + event);
readResponse();
}
}
HelloSocket.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="HelloWorld(event)">
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
protected var socketEx:SocketExample = new SocketExample();
protected function HelloWorld(event:FlexEvent):void
{
socketEx.socket.addEventListener("test", Function1);
}
protected function Function1(e:Event):void{
HelloLabel.text = "World";
}
]]>
</fx:Script>
<s:Label id="HelloLabel" x="150" y="180" text="Hello" fontSize="20" fontWeight="bold"/>
</s:WindowedApplication>
I hope that helps somebody. So this is how to send messages from a Java SocketServer (see code in my question) , receive it in flash and use it in the script code of the .mxml file
I am looking for a way to (re)deploy an exploded bundle (meaning not jarred but in a folder) to a running Apache Felix OSGi container from within Eclipse, preferably using a launch task.
I found this question, which has an answer that comes close but it depends on typing commands into a Gogo shell, which is not convenient for long-term development use. I'd like to use Eclipse's launch task mechanism for this, but if there are alternatives that are equally fast and convenient I am open to that as well.
Now I think that if I can fire Gogo shell commands from an Eclipse launch tasks, that would be a solution, but I also can't get my head around how to do that. I presume I need the Remote Shell bundle for that right?
I am starting to think about writing a telnet client in Java that can connect to the Remote Shell bundle and execute Gogo commands in an automated fashion. I have seen some example of that already which I can modify to suit my needs... However I am getting a 'reinventing the wheel' kind of feeling from that. Surely there is a better way?
Some background to help you understand what I am doing:
I have set up an Eclipse 'OSGiContainer' project which basically contains the Apache Felix jar and the third party bundles I want to deploy (like Gogo shell), similar to the project setup described here. Then I created a second 'MyBundle' project that contains my bundle. I want to start the OSGi container by launching the OSGiContainer project, and then just develop on my bundle and test my changes by launching the MyBundle project into the OSGiContainer that I just want to keep running the whole time during development.
Project layout:
OSGiContainer
bin (contains felix jar)
bundles (third party bundles)
conf (Felix' config.properties file)
MyBundle
src
target
classes
I am then able to deploy my bundle to the OSGi container by invoking these commands on the Gogo shell:
install reference:file:../MyBundle/target/classes
start <bundleId>
To re-deploy, I invoke these commands:
stop <bundleId>
uninstall <bundleId>
install reference:file:../MyBundle/target/classes
start <bundleId>
You can imagine having to invoke 4 commands on the shell each time is not that much fun... So even if you can give me a way to boil this down to less commands to type it would be a great improvement already.
UPDATE
I hacked around a bit and came up with the class below. It's an adaptation of the telnet example with some small changes and a main method with the necessary commands to uninstall a bundle and then re-install and start it. The path to the bundle should be given as an argument to the program and would look like:
reference:file:../MyBundle/target/classes
I still very much welcome answers to this question, as I don't really like this solution at all. I have however verified that this works:
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.net.SocketException;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.LinkedBlockingQueue;
import org.apache.commons.net.telnet.TelnetClient;
public class GogoDeployer {
static class Responder extends Thread {
private StringBuilder builder = new StringBuilder();
private final GogoDeployer checker;
private CountDownLatch latch;
private String waitFor = null;
private boolean isKeepRunning = true;
Responder(GogoDeployer checker) {
this.checker = checker;
}
boolean foundWaitFor(String waitFor) {
return builder.toString().contains(waitFor);
}
public synchronized String getAndClearBuffer() {
String result = builder.toString();
builder = new StringBuilder();
return result;
}
#Override
public void run() {
while (isKeepRunning) {
String s;
try {
s = checker.messageQueue.take();
} catch (InterruptedException e) {
break;
}
synchronized (Responder.class) {
builder.append(s);
}
if (waitFor != null && latch != null && foundWaitFor(waitFor)) {
latch.countDown();
}
}
System.out.println("Responder stopped.");
}
public String waitFor(String waitFor) {
synchronized (Responder.class) {
if (foundWaitFor(waitFor)) {
return getAndClearBuffer();
}
}
this.waitFor = waitFor;
latch = new CountDownLatch(1);
try {
latch.await();
} catch (InterruptedException e) {
e.printStackTrace();
return null;
}
String result = null;
synchronized (Responder.class) {
result = builder.toString();
builder = new StringBuilder();
}
return result;
}
}
static class TelnetReader extends Thread {
private boolean isKeepRunning = true;
private final GogoDeployer checker;
private final TelnetClient tc;
TelnetReader(GogoDeployer checker, TelnetClient tc) {
this.checker = checker;
this.tc = tc;
}
#Override
public void run() {
InputStream instr = tc.getInputStream();
try {
byte[] buff = new byte[1024];
int ret_read = 0;
do {
if (instr.available() > 0) {
ret_read = instr.read(buff);
}
if (ret_read > 0) {
checker.sendForResponse(new String(buff, 0, ret_read));
ret_read = 0;
}
} while (isKeepRunning && (ret_read >= 0));
} catch (Exception e) {
System.err.println("Exception while reading socket:" + e.getMessage());
}
try {
tc.disconnect();
checker.stop();
System.out.println("Disconnected.");
} catch (Exception e) {
System.err.println("Exception while closing telnet:" + e.getMessage());
}
}
}
private static final String prompt = "g!";
private static GogoDeployer client;
private String host;
private BlockingQueue<String> messageQueue = new LinkedBlockingQueue<String>();
private int port;
private TelnetReader reader;
private Responder responder;
private TelnetClient tc;
public GogoDeployer(String host, int port) {
this.host = host;
this.port = port;
}
public void stop() {
responder.isKeepRunning = false;
reader.isKeepRunning = false;
try {
Thread.sleep(10);
} catch (InterruptedException e) {
}
responder.interrupt();
reader.interrupt();
}
public void send(String command) {
PrintStream ps = new PrintStream(tc.getOutputStream());
ps.println(command);
ps.flush();
}
public void sendForResponse(String s) {
messageQueue.add(s);
}
public void connect() throws SocketException, IOException {
tc = new TelnetClient();
tc.connect(host, port);
reader = new TelnetReader(this, tc);
reader.start();
responder = new Responder(this);
responder.start();
}
public String waitFor(String s) {
return responder.waitFor(s);
}
private static String exec(String cmd) {
String result = "";
System.out.println(cmd);
client.send(cmd);
result = client.waitFor(prompt);
return result;
}
public static void main(String[] args) {
try {
String project = args[0];
client = new GogoDeployer("localhost", 6666);
client.connect();
System.out.println(client.waitFor(prompt));
System.out.println(exec("uninstall " + project));
String result = exec("install " + project);
System.out.println(result);
int start = result.indexOf(":");
int stop = result.indexOf(prompt);
String bundleId = result.substring(start + 1, stop).trim();
System.out.println(exec("start " + bundleId));
client.stop();
} catch (SocketException e) {
System.err.println("Unable to conect to Gogo remote shell: " + e.getMessage());
} catch (IOException e) {
System.err.println("Unable to conect to Gogo remote shell: " + e.getMessage());
}
}
}
When I met the same requirement (deploy bundle from target/classes as fast as I can) my first thought was also extending my container with some shell functionality. My second thought was, however, to write a simple bundle that opens up an always-on-top window and I can simply drag-and-drop any project(s) from Eclipse (or total commander or whatever) to that window. The code than checks if the folder(s) that was dropped has a target/classes folder and if it has it will be deployed.
The source code is available at https://github.com/everit-org/osgi-richconsole
The dependency is available from the maven-central.
The dependency is:
<dependency>
<groupId>org.everit.osgi.dev</groupId>
<artifactId>org.everit.osgi.dev.richconsole</artifactId>
<version>1.2.0</version>
</dependency>
You can use the bundle it while you develop and remove it when you set up your live server. However it is not necessary as if the container is running in a headless mode the pop-up window is not shown.
I called it richconsole as I would like to have more features in the future (not just deployment) :)