IDEX-3512: Add provider and binding for user token on machine

assembly-machine-war/src/main/java/org/eclipse/che/ide/ext/java/server/EventBusURLProvider.java

@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2015 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.ext.java.server;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+import java.util.regex.Pattern;
+
+/**
+ * Provides value of web socket url to set up event bus between machine and api.
+ *
+ * @author Anton Korneta
+ */
+public class EventBusURLProvider extends ApiEndpointProvider {
+    /** changes url protocol to web socket e.g https: to ws: */
+    private static final Pattern URL_PROTOCOL_PATTERN = Pattern.compile("([A-Za-z]{3,9}:)");
+
+    @Inject
+    @Named("user.token")
+    String token;
+
+    @Override
+    public String get() {
+        return URL_PROTOCOL_PATTERN.matcher(super.get()).replaceFirst("ws:") + "/eventbus/?token=" + token;
+    }
+}

assembly-machine-war/src/main/java/org/eclipse/che/ide/ext/java/server/MachineModule.java

@@ -15,6 +15,7 @@
 import com.google.inject.name.Names;
 
 import org.eclipse.che.api.auth.oauth.OAuthTokenProvider;
+import org.eclipse.che.api.core.notification.WSocketEventBusClient;
 import org.eclipse.che.api.core.rest.ApiInfoService;
 import org.eclipse.che.api.core.rest.CoreRestModule;
 import org.eclipse.che.api.git.GitConnectionFactory;
@@ -26,6 +27,7 @@
 import org.eclipse.che.api.user.server.dao.UserDao;
 import org.eclipse.che.api.vfs.server.VirtualFileSystemModule;
 import org.eclipse.che.api.vfs.server.VirtualFileSystemRegistry;
+import org.eclipse.che.commons.lang.Pair;
 import org.eclipse.che.everrest.CodenvyAsynchronousJobPool;
 import org.eclipse.che.generator.archetype.ArchetypeGenerator;
 import org.eclipse.che.generator.archetype.ArchetypeGeneratorModule;
@@ -88,6 +90,26 @@ protected void configure() {
         bind(ServiceBindingHelper.bindingKey(AsynchronousJobService.class, "/async/{ws-id}")).to(AsynchronousJobService.class);
 
         bind(String.class).annotatedWith(Names.named("api.endpoint")).toProvider(ApiEndpointProvider.class);
+        bind(String.class).annotatedWith(Names.named("user.token")).toProvider(UserTokenProvider.class);
+        bind(WSocketEventBusClient.class).asEagerSingleton();
+
+        bind(String.class).annotatedWith(Names.named("event.bus.url")).toProvider(EventBusURLProvider.class);
+    }
+
+    //it's need for WSocketEventBusClient and in the future will be replaced with the property
+    @Named("notification.client.event_subscriptions")
+    @Provides
+    @SuppressWarnings("unchecked")
+    Pair<String, String>[] eventSubscriptionsProvider(@Named("event.bus.url") String eventBusURL) {
+        return new Pair[] {Pair.of(eventBusURL, "")};
+    }
+
+    //it's need for EventOriginClientPropagationPolicy and in the future will be replaced with the property
+    @Named("notification.client.propagate_events")
+    @Provides
+    @SuppressWarnings("unchecked")
+    Pair<String, String>[] propagateEventsProvider(@Named("event.bus.url") String eventBusURL) {
+        return new Pair[] {Pair.of(eventBusURL, "")};
     }
 
     @Provides

assembly-machine-war/src/main/java/org/eclipse/che/ide/ext/java/server/UserTokenProvider.java

@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2015 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.ext.java.server;
+
+import com.google.inject.Provider;
+
+import static com.google.common.base.Strings.nullToEmpty;
+
+/**
+ * @author Anton Korneta
+ */
+public class UserTokenProvider implements Provider<String> {
+
+    public static final String USER_TOKEN = "USER_TOKEN";
+
+    @Override
+    public String get() {
+        return nullToEmpty(System.getenv(USER_TOKEN));
+    }
+}