How do I prevent builds between multiple changes to the workspace?-优快云博客

本文介绍如何通过批量操作避免频繁更改工作空间资源导致的额外构建和通知，提出使用IWorkspaceRunnable和WorkspaceJob来优化资源变更流程。通过示例代码展示如何创建文件夹等操作，确保工作空间变更高效有序。

Every time resources in the workspace change, a resource change notification is broadcast, and autobuild gets a chance to run. This can become very costly if you are making several changes in succession to the workspace. To avoid these extra builds and notifications, it is very important that you batch all of your workspace changes into a single workspace operation. It is easy to accidentally cause extra builds if you aren’t very careful about batching your changes. For example, even creating and modifying attributes on IMarker objects will cause separate resource change events if they are not batched.

Two different mechanisms are available for batching changes. To run a series of changes in the current thread, use IWorkspaceRunnable. Here is an example of a workspace runnable that creates two folders:

   final IFolder folder1 = ..., folder2 = ...;
   workspace.run(new IWorkspaceRunnable() {
      public void run(IProgressMonitor monitor) {
         folder1.create(IResource.NONE, true, null);
         folder2.create(IResource.NONE, true, null);
      }
   }, null);

The other mechanism for batching resource changes is a WorkspaceJob. Introduced in Eclipse 3.0, this mechanism is the asynchronous equivalent of IWorkspaceRunnable. When you create and schedule a workspace job, it will perform the changes in a background thread and then cause a single resource change notification and autobuild to occur. Here is sample code using a workspace job:


   final IFolder folder1 = ..., folder2 = ...;
   Job job = new WorkspaceJob("Creating folders") {
      public IStatus runInWorkspace(IProgressMonitor monitor) 
         throws CoreException {
         folder1.create(IResource.NONE, true, null);
         folder2.create(IResource.NONE, true, null);
         return Status.OK_STATUS;
      }
   };
   job.schedule();

原文：http://wiki.eclipse.org/FAQ_How_do_I_prevent_builds_between_multiple_changes_to_the_workspace%3F