Examples with SoftReference java.lang.ref.SoftReference used on opensource projects

Example 11 with SoftReference

use of java.lang.ref.SoftReference in project jdk8u_jdk by JetBrains.

the class Pin method main.

public static void main(String[] args) throws Exception {
    SoftReference[] blocks = new SoftReference[NUM_BLOCKS];
    byte[] block;
    System.err.println("Filling array with " + NUM_BLOCKS + " SoftReferences to blocks of " + BLOCK_SIZE + " bytes.");
    for (int i = 0; i < NUM_BLOCKS; ++i) {
        block = new byte[BLOCK_SIZE];
        SoftReference ref = new SoftReference(block);
        blocks[i] = ref;
    }
    block = null;
    System.err.println("Allowing SoftReferences to be enqueued.");
    System.gc();
    Thread.sleep(1000);
    /* -- Commenting out the following section will hide the bug -- */
    System.err.println("Invoking get() on SoftReferences.");
    for (int i = 0; i < NUM_BLOCKS; ++i) {
        block = (byte[]) blocks[i].get();
    }
    block = null;
    /* -- end -- */
    System.err.println("Forcing desperate garbage collection...");
    java.util.Vector chain = new java.util.Vector();
    try {
        while (true) {
            System.gc();
            int[] hungry = new int[65536];
            chain.addElement(hungry);
            // yield, for what it's worth
            Thread.sleep(100);
        }
    } catch (OutOfMemoryError e) {
        System.err.println("Got OutOfMemoryError, as expected.");
    }
    int emptyCount = 0, fullCount = 0;
    System.err.print("Examining contents of array:");
    for (int i = 0; i < NUM_BLOCKS; ++i) {
        block = (byte[]) blocks[i].get();
        if (block == null) {
            emptyCount++;
        } else {
            fullCount++;
        }
    }
    System.err.println(" " + emptyCount + " empty, " + fullCount + " full.");
    if (emptyCount == 0)
        throw new Exception("No SoftReference instances were cleared");
}

Example 12 with SoftReference

use of java.lang.ref.SoftReference in project intellij-community by JetBrains.

the class SingleRootFileViewProvider method getDocument.

@Override
public Document getDocument() {
    Document document = com.intellij.reference.SoftReference.dereference(myDocument);
    if (document == null) /* TODO[ik] make this change && isEventSystemEnabled()*/
    {
        document = FileDocumentManager.getInstance().getDocument(getVirtualFile());
        myDocument = document == null ? null : new SoftReference<>(document);
    }
    return document;
}

Example 13 with SoftReference

use of java.lang.ref.SoftReference in project clochure by videlalvaro.

the class DynamicClassLoader method defineClass.

public Class defineClass(String name, byte[] bytes, Object srcForm) {
    Util.clearCache(rq, classCache);
    Class c = defineClass(name, bytes, 0, bytes.length);
    classCache.put(name, new SoftReference(c, rq));
    return c;
}

Example 14 with SoftReference

use of java.lang.ref.SoftReference in project robovm by robovm.

the class ReferenceTest method test_isEnqueued.

/**
     * java.lang.ref.Reference#isEnqueued()
     */
public void test_isEnqueued() {
    ReferenceQueue rq = new ReferenceQueue();
    obj = new Object();
    Reference ref = new SoftReference(obj, rq);
    assertTrue("Should start off not enqueued.", !ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should now be enqueued.", ref.isEnqueued());
    ref.enqueue();
    assertTrue("Should still be enqueued.", ref.isEnqueued());
    rq.poll();
    // This fails ...
    assertTrue("Should now be not enqueued.", !ref.isEnqueued());
}

Example 15 with SoftReference

use of java.lang.ref.SoftReference in project robovm by robovm.

the class SoftReferenceTest method test_ConstructorLjava_lang_ObjectLjava_lang_ref_ReferenceQueue.

/**
     * java.lang.ref.SoftReference#SoftReference(java.lang.Object,
     *        java.lang.ref.ReferenceQueue)
     */
public void test_ConstructorLjava_lang_ObjectLjava_lang_ref_ReferenceQueue() {
    ReferenceQueue rq = new ReferenceQueue();
    bool = new Boolean(true);
    try {
        SoftReference sr = new SoftReference(bool, rq);
        assertTrue("Initialization failed.", ((Boolean) sr.get()).booleanValue());
    } catch (Exception e) {
        fail("Exception during test : " + e.getMessage());
    }
    boolean exception = false;
    try {
        new SoftReference(bool, null);
    } catch (NullPointerException e) {
        exception = true;
    }
    assertTrue("Should not throw NullPointerException", !exception);
}