Example usage for java.lang System identityHashCode

Introduction

In this page you can find the example usage for java.lang System identityHashCode.

Prototype

@HotSpotIntrinsicCandidate
public static native int identityHashCode(Object x);

Source Link

Document

Returns the same hash code for the given object as would be returned by the default method hashCode(), whether or not the given object's class overrides hashCode().

Usage

From source file:org.apache.mnemonic.ChunkBufferNGTest.java

@Test(dependsOnMethods = { "testGenChunkBuffers" })
public void testCheckChunkBuffers() {
    Checksum cs = new CRC32();
    cs.reset();//from w w  w.j  a  va  2s . c o m
    NonVolatileMemAllocator act = new NonVolatileMemAllocator(
            Utils.getNonVolatileMemoryAllocatorService("pmalloc"), 1L, "./pmchunkbuffertest.dat", false);
    act.setChunkReclaimer(new Reclaim<Long>() {
        @Override
        public boolean reclaim(Long mres, Long sz) {
            System.out.println(String.format("Reclaim Memory Chunk: %X  Size: %s",
                    System.identityHashCode(mres), null == sz ? "NULL" : sz.toString()));
            return false;
        }
    });
    DurableChunk<NonVolatileMemAllocator> mch;
    mch = act.retrieveChunk(act.getHandler(m_keyid));
    Assert.assertNotNull(mch);
    long bufcnt = mch.getSize() / m_bufsize;

    ChunkBuffer ckbuf;
    byte[] buf;
    for (long idx = 0; idx < bufcnt; ++idx) {
        ckbuf = mch.getChunkBuffer(idx * m_bufsize, m_bufsize);
        Assert.assertNotNull(ckbuf);
        buf = new byte[m_bufsize];
        ckbuf.get().clear();
        ckbuf.get().get(buf);
        cs.update(buf, 0, buf.length);
    }
    act.close();

    Assert.assertEquals(m_checksum, cs.getValue());
    Assert.assertEquals(m_count, bufcnt);
    System.out.println(
            String.format("The checksum of chunk buffers are %d, Total count is %d", m_checksum, m_count));
}

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From source file:chronos.mbeans.QuartzSchedulerAdapter.java

/**
 * {@inheritDoc}/*w  w w.jav  a  2s . c om*/
 *
 * @see chronos.mbeans.QuartzSchedulerAdapterMBean#start()
 */
@Override
public final void start() {
    if (schedulerRef.get() == null) {
        final StdSchedulerFactory factory = new StdSchedulerFactory();
        try {
            final boolean createOwnScheduler = factory.getAllSchedulers().size() == 0;
            if (createOwnScheduler) {
                createOwnScheduler(factory);
            } else {
                logger.debug("Using existing scheduler instance");
            }
            final Scheduler scheduler = factory.getScheduler();
            if (null != scheduler) {
                logger.trace("Got scheduler "
                        + getUniqueIdentifier(scheduler.getSchedulerName(), scheduler.getSchedulerInstanceId())
                        + "@" + System.identityHashCode(scheduler));

                TestJob.initializeTestJob(scheduler);

                if (schedulerRef.compareAndSet(null, scheduler)) {
                    if (createOwnScheduler) {
                        logger.debug("Quartz scheduler successfully created. Starting...");
                        try {
                            scheduler.start();
                            logger.debug("Quartz started up successfully");
                        } catch (final SchedulerException e) {
                            logger.error("Scheduler start() failed!: " + e.getMessage(), e);
                        }
                    }
                } else {
                    logger.warn("Tried to set schedulerRef, expecting null but was already set!");
                }
            } else {
                logger.error("factory.getScheduler() returned null!");
            }
        } catch (final SchedulerException e) {
            logger.error("Initializing scheduler failed!: " + e.getMessage(), e);
        }
    }
}

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From source file:org.dataconservancy.dcs.util.PooledKeyDigestPathAlgorithm.java

/**
 * Calculate a hash code over the supplied string.
 *
 * @param in the string// w  w  w . j  ava  2 s. c om
 * @return the hash code, encoded in hexadecimal.
 */
String hash(String in) {
    MessageDigest md = null;
    try {
        md = mdPool.borrowObject();
        return new String(Hex.encodeHex(md.digest(in.getBytes("UTF-8"))));
    } catch (Exception e) {
        throw new RuntimeException("Could not calculate id hash", e);
    } finally {
        // There's no guarantees by the JVM when the finalizer will run, so that is why we allow the pool
        // to grow if it is exhausted.
        if (md != null) {
            try {
                mdPool.returnObject(md);
            } catch (Exception e) {
                log.warn("Error returning MessageDigest object (0x{}) to the pool: {}",
                        new Object[] { Integer.toHexString(System.identityHashCode(md)), e.getMessage() }, e);
            }
        }
    }
}

---

From source file:org.diffkit.diff.custom.DKCustomDBSink.java

public String toString() {
    if (DKRuntime.getInstance().getIsTest())
        return _summaryFile.getName();
    return String.format("%s@%x[%s]", ClassUtils.getShortClassName(this.getClass()),
            System.identityHashCode(this), _summaryFile.getPath());
}

---

From source file:org.codehaus.groovy.grails.commons.metaclass.WeakGenericDynamicProperty.java

public Object get(Object object) {
    String propertyKey = System.identityHashCode(object) + getPropertyName();

    SoftReference<Object> ref = propertyToInstanceMap.get(propertyKey);
    Object val = (ref != null) ? ref.get() : null;
    if (val != null) {
        return val;
    } else if (this.initialValueGenerator != null) {
        final Object value = this.initialValueGenerator.execute(object);
        propertyToInstanceMap.put(propertyKey, new SoftReference<Object>(value));
        return value;
    } else if (this.initialValue != null) {
        propertyToInstanceMap.put(propertyKey, new SoftReference<Object>(this.initialValue));
        return this.initialValue;
    }// www  .  j ava2  s  .c  om
    return null;
}

---

From source file:it.unibo.alchemist.boundary.monitors.EnvironmentInspector.java

@Override
public void stepDone(final Environment<T> env, final Reaction<T> r, final Time time, final long step) {
    mutex.acquireUninterruptibly();/*from   w  w w  .ja v  a2 s.c  o m*/
    if (System.identityHashCode(fpCache) != System.identityHashCode(filePath)) {
        fpCache = filePath;
        if (writer != null) {
            writer.close();
        }
        try {
            writer = new PrintStream(new File(fpCache), StandardCharsets.UTF_8.name());
        } catch (FileNotFoundException | UnsupportedEncodingException e) {
            L.error("Could create a PrintStream", e);
        }
    }
    final double sample = interval.getVal() * FastMath.pow(10, intervaloom.getVal());
    final boolean log = mode.equals(Mode.TIME) ? time.toDouble() - lastUpdate >= sample
            : step - lastStep >= sample;
    if (log) {
        lastUpdate = time.toDouble();
        lastStep = step;
        writeData(env, r, time, step);
    }
    mutex.release();
}

---

From source file:gdsc.smlm.model.ImageModel.java

/**
 * Construct a new image model/*from   w  ww . ja  va 2s  . co  m*/
 * 
 * @param tOn
 *            Average on-state time
 * @param tOff
 *            Average off-state time for the first dark state
 * @param tOff2
 *            Average off-state time for the second dark state
 * @param nBlinks
 *            Average number of blinks int the first dark state (used for each burst between second dark states)
 * @param nBlinks2
 *            Average number of blinks into the second dark state
 */
public ImageModel(double tOn, double tOff, double tOff2, double nBlinks, double nBlinks2) {
    init(tOn, tOff, tOff2, nBlinks, nBlinks2,
            new Well19937c(System.currentTimeMillis() + System.identityHashCode(this)));
}

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From source file:org.n52.iceland.config.json.JsonConfiguration.java

/**
 * Destroys this configuration by executing any pending write.
 *
 * @see Debouncer#finish()//from  www  .  j a  va  2 s .  c o m
 */
@Override
public void destroy() {
    LOG.info("Destroying {}", System.identityHashCode(this));
    this.debouncer.finish();
}

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From source file:org.apache.mnemonic.DurablePersonNGTest.java

@Test(expectedExceptions = { OutOfHybridMemory.class })
public void testGenPeople() throws OutOfHybridMemory, RetrieveDurableEntityError {
    Random rand = Utils.createRandom();
    NonVolatileMemAllocator act = new NonVolatileMemAllocator(
            Utils.getNonVolatileMemoryAllocatorService("pmalloc"), 1024L * 1024 * 1024, "./pobj_person.dat",
            true);/*  w  w  w  .ja v  a 2 s .co  m*/
    cKEYCAPACITY = act.handlerCapacity();
    act.setBufferReclaimer(new Reclaim<ByteBuffer>() {
        @Override
        public boolean reclaim(ByteBuffer mres, Long sz) {
            System.out.println(String.format("Reclaim Memory Buffer: %X  Size: %s",
                    System.identityHashCode(mres), null == sz ? "NULL" : sz.toString()));
            return false;
        }
    });
    act.setChunkReclaimer(new Reclaim<Long>() {
        @Override
        public boolean reclaim(Long mres, Long sz) {
            System.out.println(String.format("Reclaim Memory Chunk: %X  Size: %s",
                    System.identityHashCode(mres), null == sz ? "NULL" : sz.toString()));
            return false;
        }
    });

    for (long i = 0; i < cKEYCAPACITY; ++i) {
        act.setHandler(i, 0L);
    }

    Person<Integer> mother;
    Person<Integer> person;

    Checksum pic_cs = new CRC32();
    pic_cs.reset();
    Checksum fp_cs = new CRC32();
    fp_cs.reset();

    long keyidx = 0;
    long val;

    try {
        while (true) {
            // if (keyidx >= KEYCAPACITY) break;

            keyidx %= cKEYCAPACITY;

            System.out.printf("************ Generating People on Key %d ***********\n", keyidx);

            val = act.getHandler(keyidx);
            if (0L != val) {
                PersonFactory.restore(act, val, true);
            }

            person = PersonFactory.create(act);
            person.setAge((short) rand.nextInt(50));
            person.setName(String.format("Name: [%s]", UUID.randomUUID().toString()), true);
            person.setName(String.format("Name: [%s]", UUID.randomUUID().toString()), true);
            person.setName(String.format("Name: [%s]", UUID.randomUUID().toString()), true);
            person.setName(String.format("Name: [%s]", UUID.randomUUID().toString()), true);

            person.setPicture(genuptBuffer(act, pic_cs, genRandSize()), true);
            person.setPreference(genuptChunk(act, fp_cs, genRandSize()), true);

            act.setHandler(keyidx, person.getHandler());
            pic_checksum = pic_cs.getValue();
            fp_checksum = fp_cs.getValue();

            for (int deep = 0; deep < rand.nextInt(100); ++deep) {

                mother = PersonFactory.create(act);
                mother.setAge((short) (50 + rand.nextInt(50)));
                mother.setName(String.format("Name: [%s]", UUID.randomUUID().toString()), true);
                mother.setPicture(genuptBuffer(act, pic_cs, genRandSize()), true);
                mother.setPreference(genuptChunk(act, fp_cs, genRandSize()), true);

                person.setMother(mother, true);
                pic_checksum = pic_cs.getValue();
                fp_checksum = fp_cs.getValue();

                person = mother;

            }
            ++keyidx;
        }
    } finally {
        act.close();
    }
}

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From source file:com.jaspersoft.jasperserver.api.engine.jasperreports.util.JarURLStreamHandler.java

protected int hashCode(URL u) {
    return System.identityHashCode(u);
}

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