How to start a JavaFx OSGi bundle - java

I'm trying to run a JavaFx OSGi module, but I keep getting the error:
org.osgi.framework.BundleException: Unable to resolve OSGiDmHelloWorldProvider [7](R 7.0): missing requirement [OSGiDmHelloWorldProvider [7](R 7.0)] osgi.wiring.package; (osgi.wiring.package=javafx.application) Unresolved requirements: [[OSGiDmHelloWorldProvider [7](R 7.0)] osgi.wiring.package; (osgi.wiring.package=javafx.application)]
at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4112)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2118)
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998)
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984)
This is how I load and start the modules:
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.Constants;
import org.osgi.framework.launch.Framework;
import org.osgi.framework.launch.FrameworkFactory;
import java.io.File;
import java.util.*;
public class Launcher {
private static String[] libs = null;
private BundleContext context;
private Launcher() {
FrameworkFactory frameworkFactory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
Map<String, String> config = new HashMap<String, String>();
config.put("osgi.console", "");
config.put("osgi.clean", "true");
config.put("osgi.noShutdown", "true");
config.put("eclipse.ignoreApp", "true");
config.put("osgi.bundles.defaultStartLevel", "4");
config.put("osgi.configuration.area", "./configuration");
// automated bundles deployment
config.put("felix.fileinstall.dir", "./dropins");
config.put("felix.fileinstall.noInitialDelay", "true");
config.put("felix.fileinstall.start.level", "4");
config.put(Constants.FRAMEWORK_BOOTDELEGATION, "javafx.*,com.sun.javafx.*");
config.put(Constants.FRAMEWORK_BUNDLE_PARENT, Constants.FRAMEWORK_BUNDLE_PARENT_APP);
Framework framework = frameworkFactory.newFramework(config);
try {
framework.init();
framework.start();
} catch (BundleException e) {
e.printStackTrace();
}
context = framework.getBundleContext();
Bundle OSGiDmHelloWorldProvider = install("OSGiDmHelloWorldProvider");
try {
OSGiDmHelloWorldProvider.start();
} catch (BundleException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
new Launcher();
}
private String[] getLibs() {
if (libs == null) {
List<String> jarsList = new ArrayList<String>();
File pluginsDir = new File("libs");
System.out.println("PATHS : " + pluginsDir.getAbsolutePath());
for (String jar : pluginsDir.list()) {
jarsList.add(jar);
}
libs = jarsList.toArray(new String[jarsList.size()]);
}
return libs;
}
protected Bundle install(String name) {
String found = null;
for (String jar : getLibs()) {
if (jar.startsWith(name)) {
found = String.format("file:libs/%s", jar);
System.out.println(found);
break;
}
}
if (found == null) {
throw new RuntimeException(String.format("JAR for %s not found", name));
}
try {
return context.installBundle(found);
} catch (BundleException e) {
e.printStackTrace();
}
return null;
}
}
The OSGiDmHelloWorldProvider Activator class:
import com.bw.osgi.provider.able.HelloWorldService;
import com.bw.osgi.provider.impl.HelloWorldServiceImpl;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ProviderActivator implements BundleActivator {
Logger logger = LoggerFactory.getLogger(ProviderActivator.class);
Stage stage;
private ServiceRegistration registration;
BundleContext bundleContext;
#Override
public void start(BundleContext bundleContext) throws Exception {
registration = bundleContext.registerService(
HelloWorldService.class.getName(),
new HelloWorldServiceImpl(),
null);
Platform.runLater(new Runnable() {
#Override
public void run() {
stage = new Stage();
BorderPane pane = new BorderPane();
Scene scene = new Scene(pane, 400, 200);
pane.setCenter(new Label("This is a JavaFX Scene in a Stage"));
stage.setScene(scene);
stage.show();
}
});
System.out.println("STAGE CALLED !!!");
}
#Override
public void stop(BundleContext bundleContext) throws Exception {
registration.unregister();
logger.info("Set4Jfx Bundle: stop()");
Platform.runLater(new Runnable() {
#Override
public void run() {
stage.close();
}
});
}
}
How can I load a module that uses JavaFx in a Maven OSGi application?

The error message means that your bundle imports package javafx.application, and no bundle exports that package. Therefore the import cannot be resolved.
I note that in your launcher code you try to set bootdelegation to javafx.*. That might allow the class to be loaded from the boot classpath if your bundle ever got as far as running, however it cannot get that far because of the unresolved import.
If you intend for the JavaFX classes to be loaded from the boot classloader then you should remove the package import from your own bundle. You would also have to arrange for the JavaFX classes to actually be provided by the boot classloader, since AFAIK they are normally only visible from the extension classloader.
However a better solution would be leave the import alone, and arrange for the javafx.application package to be exported from a bundle. That could be done from the system bundle using Constants.FRAMEWORK_SYSTEMPACKAGES_EXTRA.
Update
You should probably look at the Drombler FX tool/framework from #Puce, since it sounds like he has already done a lot of these setup tasks. However I felt that his answer didn't directly address your question about why your code was failing.

I've released some first versions of Drombler FX - the modular application framework for JavaFX based on OSGi and Maven (POM first).
It takes care of initializing JavaFX and OSGi.
Maybe you find it useful. The application framework is Open Source and the code is available on GitHub.
There is also a tutorial with a Getting Started trail.

Related

NoClassDefFound React Native Library Install Android

I am trying to install https://github.com/theopolisme/react-native-stripe-terminal on a fresh react native init project. When I try to initialize the library I get the following runtime error.
Error: Exception in HostObject::get for prop 'RNStripeTerminal': java.lang.NoClassDefFoundError: com.reactnative_stripeterminal.Constants, js engine: hermes
From my research it seems that package is not install properly. But I've tried both Auto Linking and manual installation with the same error. It doesn't seem like this library is very well maintained, but it could also be user error. I'm using react 67.4 and Java 11 on a Macbook M1. Current manual installation below.
app/build.gradle
dependencies {
implementation project(':react-native-stripe-terminal')
MainApplication.java
package com.stripeterminaldemo;
import android.app.Application;
import android.content.Context;
import com.facebook.react.PackageList;
import com.facebook.react.ReactApplication;
import com.reactnative_stripeterminal.RNStripeTerminalPackage;
import com.facebook.react.ReactInstanceManager;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.config.ReactFeatureFlags;
import com.facebook.soloader.SoLoader;
import com.stripeterminaldemo.newarchitecture.MainApplicationReactNativeHost;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
public class MainApplication extends Application implements ReactApplication {
private final ReactNativeHost mReactNativeHost =
new ReactNativeHost(this) {
#Override
public boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
#Override
protected List<ReactPackage> getPackages() {
#SuppressWarnings("UnnecessaryLocalVariable")
List<ReactPackage> packages = new PackageList(this).getPackages();
// Packages that cannot be autolinked yet can be added manually here, for example:
// packages.add(new MyReactNativePackage());
packages.add(new RNStripeTerminalPackage());
return packages;
}
#Override
protected String getJSMainModuleName() {
return "index";
}
};
private final ReactNativeHost mNewArchitectureNativeHost =
new MainApplicationReactNativeHost(this);
#Override
public ReactNativeHost getReactNativeHost() {
if (BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
return mNewArchitectureNativeHost;
} else {
return mReactNativeHost;
}
}
#Override
public void onCreate() {
super.onCreate();
// If you opted-in for the New Architecture, we enable the TurboModule system
ReactFeatureFlags.useTurboModules = BuildConfig.IS_NEW_ARCHITECTURE_ENABLED;
SoLoader.init(this, /* native exopackage */ false);
initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
}
/**
* Loads Flipper in React Native templates. Call this in the onCreate method with something like
* initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
*
* #param context
* #param reactInstanceManager
*/
private static void initializeFlipper(
Context context, ReactInstanceManager reactInstanceManager) {
if (BuildConfig.DEBUG) {
try {
/*
We use reflection here to pick up the class that initializes Flipper,
since Flipper library is not available in release mode
*/
Class<?> aClass = Class.forName("com.stripeterminaldemo.ReactNativeFlipper");
aClass
.getMethod("initializeFlipper", Context.class, ReactInstanceManager.class)
.invoke(null, context, reactInstanceManager);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
settings.gradle
rootProject.name = 'StripeTerminalDemo'
include ':react-native-stripe-terminal'
project(':react-native-stripe-terminal').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-stripe-terminal/android')
apply from: file("../node_modules/#react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesSettingsGradle(settings)
include ':app'
includeBuild('../node_modules/react-native-gradle-plugin')
if (settings.hasProperty("newArchEnabled") && settings.newArchEnabled == "true") {
include(":ReactAndroid")
project(":ReactAndroid").projectDir = file('../node_modules/react-native/ReactAndroid')
}

Use jira-rest-java-client java library in Java/gradle/groovy?

I have gradle script which is creating the version in JIRA using the REST API.
But there is jira-rest-java-client also available. I want to use the java library of jira-rest-java-client and wants to do the same stuff in gradle. Can someone provide an example how could I try this.
How to use the jira-rest-java-client library to make connection with JIRA through example?
In Java I am trying to use this JRCJ Library but getting below error through Intellj
import com.atlassian.jira.rest.client.api.JiraRestClient;
import com.atlassian.jira.rest.client.api.domain.*;
import com.atlassian.jira.rest.client.api.domain.input.ComplexIssueInputFieldValue;
import com.atlassian.jira.rest.client.api.domain.input.FieldInput;
import com.atlassian.jira.rest.client.api.domain.input.TransitionInput;
import com.atlassian.jira.rest.client.internal.ServerVersionConstants;
import com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory;
import com.google.common.collect.Lists;
import org.codehaus.jettison.json.JSONException;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
/**
* A sample code how to use JRJC library
*
* #since v0.1
*/
public class Example1 {
private static URI jiraServerUri = URI.create("http://localhost:2990/jira");
private static boolean quiet = false;
public static void main(String[] args) throws URISyntaxException, JSONException, IOException {
parseArgs(args);
final AsynchronousJiraRestClientFactory factory = new AsynchronousJiraRestClientFactory();
final JiraRestClient restClient = factory.createWithBasicHttpAuthentication(jiraServerUri, "admin", "admin");
try {
final int buildNumber = restClient.getMetadataClient().getServerInfo().claim().getBuildNumber();
// first let's get and print all visible projects (only jira4.3+)
if (buildNumber >= ServerVersionConstants.BN_JIRA_4_3) {
final Iterable<BasicProject> allProjects = restClient.getProjectClient().getAllProjects().claim();
for (BasicProject project : allProjects) {
if (project == TEST){
println(project);}else {
System.out.println("Project" + "Not Found");
}
}
}
// let's now print all issues matching a JQL string (here: all assigned issues)
if (buildNumber >= ServerVersionConstants.BN_JIRA_4_3) {
final SearchResult searchResult = restClient.getSearchClient().searchJql("assignee is not EMPTY").claim();
for (BasicIssue issue : searchResult.getIssues()) {
println(issue.getKey());
}
}
final Issue issue = restClient.getIssueClient().getIssue("TST-7").claim();
println(issue);
// now let's vote for it
restClient.getIssueClient().vote(issue.getVotesUri()).claim();
// now let's watch it
final BasicWatchers watchers = issue.getWatchers();
if (watchers != null) {
restClient.getIssueClient().watch(watchers.getSelf()).claim();
}
// now let's start progress on this issue
final Iterable<Transition> transitions = restClient.getIssueClient().getTransitions(issue.getTransitionsUri()).claim();
final Transition startProgressTransition = getTransitionByName(transitions, "Start Progress");
restClient.getIssueClient().transition(issue.getTransitionsUri(), new TransitionInput(startProgressTransition.getId()))
.claim();
// and now let's resolve it as Incomplete
final Transition resolveIssueTransition = getTransitionByName(transitions, "Resolve Issue");
final Collection<FieldInput> fieldInputs;
// Starting from JIRA 5, fields are handled in different way -
if (buildNumber > ServerVersionConstants.BN_JIRA_5) {
fieldInputs = Arrays.asList(new FieldInput("resolution", ComplexIssueInputFieldValue.with("name", "Incomplete")));
} else {
fieldInputs = Arrays.asList(new FieldInput("resolution", "Incomplete"));
}
final TransitionInput transitionInput = new TransitionInput(resolveIssueTransition.getId(), fieldInputs, Comment
.valueOf("My comment"));
restClient.getIssueClient().transition(issue.getTransitionsUri(), transitionInput).claim();
}
finally {
restClient.close();
}
}
private static void println(Object o) {
if (!quiet) {
System.out.println(o);
}
}
private static void parseArgs(String[] argsArray) throws URISyntaxException {
final List<String> args = Lists.newArrayList(argsArray);
if (args.contains("-q")) {
quiet = true;
args.remove(args.indexOf("-q"));
}
if (!args.isEmpty()) {
jiraServerUri = new URI(args.get(0));
}
}
private static Transition getTransitionByName(Iterable<Transition> transitions, String transitionName) {
for (Transition transition : transitions) {
if (transition.getName().equals(transitionName)) {
return transition;
}
}
return null;
}
}
Error:
xception in thread "main" java.lang.NoClassDefFoundError: com/atlassian/sal/api/executor/ThreadLocalContextManager
at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.create(AsynchronousJiraRestClientFactory.java:35)
at com.atlassian.jira.rest.client.internal.async.AsynchronousJiraRestClientFactory.createWithBasicHttpAuthentication(AsynchronousJiraRestClientFactory.java:42)
at Example1.main(Example1.java:34)
Caused by: java.lang.ClassNotFoundException: com.atlassian.sal.api.executor.ThreadLocalContextManager
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 3 more
Moreover I added the JRJC api,core jar in External Libraries but still getting this error?
Could someone tell me what is the issue or where am I missing something?
compile 'com.atlassian.jira:jira-rest-java-client-core:4.0.0'
compile 'com.atlassian.jira:jira-rest-java-client-api:4.0.0'
Simple connection to JIRA:
JiraRestClient restClient = new AsynchronousJiraRestClientFactory().createWithBasicHttpAuthentication(new URI("https://" + jira_domain),
jira_username, jira_password);

No suitable driver found in Vaadin project

Yes, it's that newbie to Vaadin, again. This time, I'm trying to see if I can do one of the most basic of tasks: connect to a database.
We use MS SQL Server here (version 2012, I believe) and we've been able to connect to it fine in two other Java programs that I've written. When attempting to do the same thing using a newly-created Vaadin project, however, I am told that No suitable driver found for jdbc:sqlserver://192.168.0.248;databaseName=job_orders_2014. I have checked and made sure that all three .jars from Microsoft are in the build path: sqljdbc.jar, sqljdbc4.jar, and sqljdbc41.jar.
Here's the ConnectionManager class that I've written which only tests whether or not it can get a connection:
package info.chrismcgee.sky.vaadinsqltest.dbutil;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Logger;
public class ConnectionManager {
Logger logger = Logger.getLogger(ConnectionManager.class.getName());
private static final String USERNAME = "web";
private static final String PASSWORD = "web";
private static final String CONN_STRING = "jdbc:sqlserver://192.168.0.248;databaseName=job_orders_2014";
public ConnectionManager() throws SQLException, ClassNotFoundException {
// Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = null;
try {
conn = DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD);
System.out.println("Connected!");
} catch (SQLException e) {
System.err.println(e);
} finally {
if (conn != null) {
conn.close();
}
}
}
}
The result is the SQLException message I mentioned earlier. I've tried it both with and without that Class.forName... line, which is apparently only necessary for Java versions below 7 (and we're using version 8). When that line is enabled, I get a ClassNotFoundException instead.
What gives?
EDIT 04/01/2015: To help clarify how this ConnectionManager class is called, I am simply creating an instance of it from the main class, thusly:
package info.chrismcgee.sky.vaadinsqltest;
import java.sql.SQLException;
import info.chrismcgee.sky.vaadinsqltest.dbutil.ConnectionManager;
import javax.servlet.annotation.WebServlet;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
#SuppressWarnings("serial")
#Theme("vaadinsqltest")
public class VaadinsqltestUI extends UI {
#WebServlet(value = "/*", asyncSupported = true)
#VaadinServletConfiguration(productionMode = false, ui = VaadinsqltestUI.class)
public static class Servlet extends VaadinServlet {
}
#Override
protected void init(VaadinRequest request) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);
Button button = new Button("Click Me");
button.addClickListener(new Button.ClickListener() {
public void buttonClick(ClickEvent event) {
try {
ConnectionManager connMan = new ConnectionManager();
} catch (SQLException | ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
layout.addComponent(new Label("Thank you for clicking"));
}
});
layout.addComponent(button);
}
}
You need your dependencies in your runtime environment.
Please have a look at this answer here at stackoverflow:
https://stackoverflow.com/a/19630339

How to make MongoDB Service Available?

I am developing OSGi Mongodb bundle I have also added the following dependencies
com.mongodb
org.apache.felix.fileinstal
org.amdatu.mongo
org.apache.felix.configadmin
and all the dependency managers but in gogo console I get the following error message
org.amdatu.mongo
org.osgi.service.cm.ManagedServiceFactory(service.pid=org.amdatu.mongo) registered
org.osgi.service.log.LogService service optional unavailable
[11] agenda.mongodb.mongo_gfs
agenda.mongo.inter.AgendaMongo() unregistered
org.amdatu.mongo.MongoDBService service required unavailable
the main problem is MongoDBService is not available I must require this service for solving this problem I have read the book according to them
From a development perspective, everything seems fine, but when you
run the appliā€ cation, it will complain that the MongoDBService is
unavailable. You can figure this out with the dmcommand in the shell.
We did however set up MongoDB on our system and deployed the necessary
dependencies in our runtime. Still, the MongoDBService was unable to
start. How come? This is because the MongoDBService needs some
mandatory configuration in order to know to what database to connect
to. The Amdatu MongoDB Serviceuses the Managed Service Factory pattern
(see Chapter 4), and in order to bootstrap it, we need to supply a
configuration file. In order to supply the configuration file, we need
to create a new folder in our agendaproject. Create a new folder
called load. This is the default name that the runtime will look for
in order to spot configuration files. Next, add an empty text file and
call it something like org.amdatu.mongo-demo.xml. The configuration
file needs at least the following information: dbName=demo
I have also apply this but its still unavailable.
This is interface:
package agenda.mongo.inter;
import java.io.InputStream;
public interface AgendaMongo {
public String store_in_db();
public InputStream getData(Object file_id);
}
This is the implementation for Mongodb:
package agenda.mongodb.gridfs;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.UnknownHostException;
import org.amdatu.mongo.MongoDBService;
import org.bson.types.ObjectId;
import agenda.mongo.inter.AgendaMongo;
import com.mongodb.DB;
import com.mongodb.DBCursor;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;
public class Gridfs_Mongodb implements AgendaMongo{
GridFSInputFile gfsinput=null;
private volatile MongoDBService mongoservice;
public String store_in_db() {
/*try {
GridFS gfsHandler;
gfsHandler = new GridFS(mongoservice.getDB(), "rest_data");// database
File uri = new File("f:\\get1.jpg"); // name and
gfsinput = gfsHandler.createFile(uri);
gfsinput.saveChunks(1000);
gfsinput.setFilename("new file");
gfsinput.save();
//System.out.println(gfsinput.getId());
//save_filepath("file",gfsinput.getId());
Object get_id = gfsinput.getId();//get_filename();
//System.out.println(getData(get_id));
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
//System.out.println("Exception");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
//System.out.println("Exception");
e.printStackTrace();
}*/
System.out.println("DB:" + mongoservice.getDB());
return mongoservice.getDB()+"";
}
/*
* Retrieving the file
*/
public InputStream getData(Object file_id) {
GridFS gfsPhoto = new GridFS(mongoservice.getDB(), "rest_data");
GridFSDBFile dataOutput = gfsPhoto.findOne((ObjectId) file_id);
DBCursor cursor = gfsPhoto.getFileList();
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
System.out.println(dataOutput);
return dataOutput.getInputStream();
}
void start(){
System.out.println("hello");
System.out.println(store_in_db());
}
}
Here I was just trying to get database name because every thing can be done after that but I t was returning me NULL because MongoDBService is Unavailable.
At this is Activator class
package agenda.mongodb.gridfs;
import org.amdatu.mongo.MongoDBService;
import org.apache.felix.dm.DependencyActivatorBase;
import org.apache.felix.dm.DependencyManager;
import org.osgi.framework.BundleContext;
import agenda.mongo.inter.AgendaMongo;
public class Activator extends DependencyActivatorBase {
#Override
public void init(BundleContext arg0, DependencyManager manager)
throws Exception {
manager.add(createComponent()
.setInterface(AgendaMongo.class.getName(), null)
.setImplementation(Gridfs_Mongodb.class)
.add(createServiceDependency()
.setService(MongoDBService.class)
.setRequired(true)));
}
#Override
public void destroy(BundleContext arg0, DependencyManager arg1)
throws Exception {
// TODO Auto-generated method stub
}
}
The Interface package is an exported package and the implementation package is private.
The configuration file should have a .cfg extension (not .xml).

eclipse plugin does not work after update to juno (eclipse 4)

I created an eclipse plugin that will hook into the save action to create a minified javascript file with the goolge closure compiler. See files below.
That worked until eclipse 3.7.2. Unfortunately now in eclipse 4.2.1 it seems that this creates an endless loop sometimes. The job "compile .min.js" (line 64 in ResourceChangedListener.java) seems the be the cause. It results in the case that the workspaced starts to build over and over. I guess this is because that job creates or changes a file triggering the workspace build again, which again triggers the job which triggers the build and so on.
But I can not figure out how to prevent this.
// Activator.java
package closure_compiler_save;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
/**
* The activator class controls the plug-in life cycle
*/
public class Activator extends AbstractUIPlugin {
// The plug-in ID
public static final String PLUGIN_ID = "closure-compiler-save"; //$NON-NLS-1$
// The shared instance
private static Activator plugin;
/**
* The constructor
*/
public Activator() {
}
#Override
public void start(BundleContext context) throws Exception {
super.start(context);
Activator.plugin = this;
ResourceChangedListener listener = new ResourceChangedListener();
ResourcesPlugin.getWorkspace().addResourceChangeListener(listener);
}
#Override
public void stop(BundleContext context) throws Exception {
Activator.plugin = null;
super.stop(context);
}
/**
* Returns the shared instance
*
* #return the shared instance
*/
public static Activator getDefault() {
return plugin;
}
}
// ResourceChangedListener.java
package closure_compiler_save;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
public class ResourceChangedListener implements IResourceChangeListener {
public void resourceChanged(IResourceChangeEvent event) {
if (event.getType() != IResourceChangeEvent.POST_CHANGE)
return;
IResourceDelta delta = event.getDelta();
try {
processDelta(delta);
} catch (CoreException e) {
e.printStackTrace();
}
}
// find out which class files were just built
private void processDelta(IResourceDelta delta) throws CoreException {
IResourceDelta[] kids = delta.getAffectedChildren();
for (IResourceDelta delta2 : kids) {
if (delta2.getAffectedChildren().length == 0) {
if (delta.getKind() != IResourceDelta.CHANGED)
return;
IResource res = delta2.getResource();
if (res.getType() == IResource.FILE && "js".equalsIgnoreCase(res.getFileExtension())) {
if (res.getName().contains("min"))
return;
compile(res);
}
}
processDelta(delta2);
}
}
private void compile(final IResource res) throws CoreException {
final IPath fullPath = res.getFullPath();
final IPath fullLocation = res.getLocation();
final String fileName = fullPath.lastSegment().toString();
final String outputFilename = fileName.substring(0, fileName.lastIndexOf(".")).concat(".min.js");
final String outputPath = fullPath.removeFirstSegments(1).removeLastSegments(1).toString();
final IProject project = res.getProject();
final IFile newFile = project.getFile(outputPath.concat("/".concat(outputFilename)));
Job compileJob = new Job("Compile .min.js") {
public IStatus run(IProgressMonitor monitor) {
byte[] bytes = null;
try {
bytes = CallCompiler.compile(fullLocation.toString(), CallCompiler.SIMPLE_OPTIMIZATION).getBytes();
InputStream source = new ByteArrayInputStream(bytes);
if (!newFile.exists()) {
newFile.create(source, IResource.NONE, null);
} else {
newFile.setContents(source, IResource.NONE, null);
}
} catch (IOException e) {
e.printStackTrace();
} catch (CoreException e) {
e.printStackTrace();
}
return Status.OK_STATUS;
}
};
compileJob.setRule(newFile.getProject()); // this will ensure that no two jobs are writing simultaneously on the same file
compileJob.schedule();
}
}
After I setup a blank eclipse classic environment, started a new eclipse plugin project there and recreated all files it works again partly.
In this environment starting a debug session I can save .js files and .min.js files are created automatically.
So far so good!
But when I install the plugin to my real developing eclipse environment automatic saving does not work.
At least one step further!
Step 2:
There were some files not included in the build obviously needed, like manifest. No idea why they were deselected.
Anyway it seems just setting up a blank eclipse 4 classic and going through the eclipse plugin wizard fixed my original problem. I still would love to know what was the actual problem...

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