1 files changed, 89 insertions, 0 deletions
diff --git a/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/decorators/GitDecoratorJob.java b/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/decorators/GitDecoratorJob.java
new file mode 100644
index 0000000000..a14884297b
--- /dev/null
+++ b/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/decorators/GitDecoratorJob.java
@@ -0,0 +1,89 @@
+/*******************************************************************************
+ * Copyright (C) 2011, Philipp Thun <philipp.thun@sap.com>
+ *
+ * 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
+ *******************************************************************************/
+package org.eclipse.egit.ui.internal.decorators;
+
+import java.util.HashMap;
+import java.util.HashSet;
+
+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;
+
+/**
+ * Job decorating Git resources asynchronously
+ */
+public class GitDecoratorJob extends Job {
+
+	/**
+	 * Constant defining the delay between two runs of the GitDecoratorJob in
+	 * milliseconds
+	 */
+	private static final long DELAY = 10L;
+
+	/**
+	 * There is one dedicated job for each repository
+	 */
+	private static HashMap<String, GitDecoratorJob> jobs = new HashMap<String, GitDecoratorJob>();
+
+	/**
+	 * Get the job dedicated for a given repository
+	 *
+	 * @param gitDir
+	 *            the .git directory's full path used as unique identifier of a
+	 *            repository
+	 * @return GitDecoratorJob the job dedicated for the given repository
+	 */
+	public static synchronized GitDecoratorJob getJobForRepository(
+			final String gitDir) {
+		GitDecoratorJob job = jobs.get(gitDir);
+		if (job == null) {
+			job = new GitDecoratorJob("GitDecoratorJob[" + gitDir + "]"); //$NON-NLS-1$ //$NON-NLS-2$
+			job.setSystem(true);
+			job.setPriority(DECORATE);
+			jobs.put(gitDir, job);
+		}
+		return job;
+	}
+
+	private GitDecoratorJob(final String name) {
+		super(name);
+	}
+
+	private HashSet<Object> elementList = new HashSet<Object>();
+
+	/**
+	 * Add an element to the queue of decoration requests
+	 *
+	 * @param element
+	 *            the element to be decorated
+	 */
+	public synchronized void addDecorationRequest(Object element) {
+		if (elementList.add(element)) {
+			// Schedule job
+			if (getState() == NONE)
+				schedule(DELAY);
+		}
+	}
+
+	@Override
+	public IStatus run(IProgressMonitor monitor) {
+		while (!elementList.isEmpty()) {
+			final Object[] elements;
+			synchronized (this) {
+				// Get decoration requests as array and clear the queue
+				elements = elementList.toArray(new Object[elementList.size()]);
+				elementList.clear();
+			}
+			// Call GitLightweightDecorator to process the decoration requests
+			GitLightweightDecorator.processDecoration(elements);
+		}
+		return Status.OK_STATUS;
+	}
+}