Example usage for org.eclipse.jdt.internal.core.search.processing IJob cancel

Introduction

In this page you can find the example usage for org.eclipse.jdt.internal.core.search.processing IJob cancel.

Prototype

public void cancel();

Source Link

Document

Asks this job to cancel its execution.

Usage

From source file:com.codenvy.ide.ext.java.server.internal.core.search.processing.JobManager.java

License:Open Source License

/**
 * Remove the index from cache for a given project.
 * Passing null as a job family discards them all.
 *//* w  ww  . ja  v a 2s  .  c  om*/
public void discardJobs(String jobFamily) {

    if (VERBOSE)
        Util.verbose("DISCARD   background job family - " + jobFamily); //$NON-NLS-1$

    try {
        org.eclipse.jdt.internal.core.search.processing.IJob currentJob;
        // cancel current job if it belongs to the given family
        synchronized (this) {
            currentJob = currentJob();
            disable();
        }
        if (currentJob != null && (jobFamily == null || currentJob.belongsTo(jobFamily))) {
            currentJob.cancel();

            // wait until current active job has finished
            while (this.processingThread != null && this.executing) {
                try {
                    if (VERBOSE)
                        Util.verbose("-> waiting end of current background job - " + currentJob); //$NON-NLS-1$
                    Thread.sleep(50);
                } catch (InterruptedException e) {
                    // ignore
                }
            }
        }

        // flush and compact awaiting jobs
        int loc = -1;
        synchronized (this) {
            for (int i = this.jobStart; i <= this.jobEnd; i++) {
                currentJob = this.awaitingJobs[i];
                if (currentJob != null) { // sanity check
                    this.awaitingJobs[i] = null;
                    if (!(jobFamily == null || currentJob.belongsTo(jobFamily))) { // copy down, compacting
                        this.awaitingJobs[++loc] = currentJob;
                    } else {
                        if (VERBOSE)
                            Util.verbose("-> discarding background job  - " + currentJob); //$NON-NLS-1$
                        currentJob.cancel();
                    }
                }
            }
            this.jobStart = 0;
            this.jobEnd = loc;
        }
    } finally {
        enable();
    }
    if (VERBOSE)
        Util.verbose("DISCARD   DONE with background job family - " + jobFamily); //$NON-NLS-1$
}

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