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:com.medsphere.ovid.common.uuid.KeyGenerator.java

public KeyGenerator() {
    try {/* w w  w .j  ava  2  s .co m*/
        InetAddress inet = InetAddress.getLocalHost();
        byte[] bytes = inet.getAddress();
        String inetAddressInHex = new String(Hex.encodeHex(bytes));
        String hashCodeForThis = new String(Hex.encodeHex(intToByteArray(System.identityHashCode(this))));
        middle = inetAddressInHex + hashCodeForThis;
        seeder = new SecureRandom();
        seeder.nextInt();

    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        seeder = new SecureRandom();
        seeder.nextInt();
        middle = new Integer(this.hashCode()).toString();
    }

}

From source file:org.grails.datastore.mapping.core.AbstractAttributeStoringSession.java

public void setAttribute(Object entity, String attributeName, Object value) {
    if (entity == null) {
        return;//from   ww w.  ja  v a 2s.c o  m
    }

    int id = System.identityHashCode(entity);
    Map<String, Object> attrs = attributes.get(id);
    if (attrs == null) {
        attrs = new ConcurrentHashMap<String, Object>();
        attributes.put(id, attrs);
    }

    if (attributeName != null && value != null) {
        attrs.put(attributeName, value);
    }
}

From source file:ObjectUtils.java

/**
 * Return a hex String form of an object's identity hash code.
 * @param obj the object/*from   w  ww .  ja  v  a  2 s. com*/
 * @return the object's identity code in hex notation
 */
public static String getIdentityHexString(Object obj) {
    return Integer.toHexString(System.identityHashCode(obj));
}

From source file:org.apache.mahout.common.RandomWrapper.java

RandomWrapper() {
    random = new MersenneTwister();
    random.setSeed(System.currentTimeMillis() + System.identityHashCode(random));
}

From source file:org.nuxeo.ecm.webengine.loader.store.MemoryStore.java

public MemoryStore(Map<String, byte[]> store) {
    this.store = store;
    this.location = "java:" + System.identityHashCode(this);
}

From source file:com.metamx.cache.CaffeineDruidModule.java

@Override
public List<? extends Module> getJacksonModules() {
    return ImmutableList.of(new SimpleModule("DruidCaffeineCache-" + System.identityHashCode(this))
            .registerSubtypes(CaffeineCacheProvider.class));
}

From source file:UuidGenerator.java

/**
 * Initializes the factory./*from  w w  w  .  ja v  a  2s .c om*/
 *
 * @param obj
 */
private synchronized static void initialize(final Object obj) {
    try {
        InetAddress inet = InetAddress.getLocalHost();
        byte[] bytes = inet.getAddress();
        String hexInetAddress = hexFormat(getInt(bytes), 8);
        String thisHashCode = hexFormat(System.identityHashCode(obj), 8);
        s_midValue = hexInetAddress + thisHashCode;
        s_seeder = new SecureRandom();
        s_seeder.nextInt();
    } catch (java.net.UnknownHostException e) {
        throw new Error("can not initialize the UuidGenerator generator");
    }
    s_initialized = true;
}

From source file:com.arpnetworking.metrics.proxy.models.messages.Command.java

/**
 * {@inheritDoc}/*from  ww  w . j a v  a  2s.  c o  m*/
 */
@Override
public String toString() {
    return MoreObjects.toStringHelper(this).add("id", Integer.toHexString(System.identityHashCode(this)))
            .add("class", this.getClass()).add("Command", _command).toString();
}

From source file:org.seasar.caching.interceptor.CallDescription.java

public CallDescription(MethodInvocation invocation) {
    Method method = invocation.getMethod();
    argument = invocation.getArguments();
    targetObject = System.identityHashCode(invocation.getThis());
    declaredClass = method.getDeclaringClass();
    methodName = method.getName();//from   ww w.j a  va  2  s .c o m
    methodArguments = method.getParameterTypes();
}

From source file:GUIDGenerator.java

/**
 * A 32 byte GUID generator (Globally Unique ID). These artificial keys SHOULD <strong>NOT </strong> be seen by the user,
 * not even touched by the DBA but with very rare exceptions, just manipulated by the database and the programs.
 *
 * Usage: Add an id field (type java.lang.String) to your EJB, and add setId(XXXUtil.generateGUID(this)); to the ejbCreate method.
 *///ww w.j av a2 s . c  o  m
public static final String generateGUID(Object o) {
    StringBuffer tmpBuffer = new StringBuffer(16);
    if (hexServerIP == null) {
        java.net.InetAddress localInetAddress = null;
        try {
            localInetAddress = java.net.InetAddress.getLocalHost();
        } catch (java.net.UnknownHostException uhe) {
            return null;
        }
        byte serverIP[] = localInetAddress.getAddress();
        hexServerIP = hexFormat(getInt(serverIP), 8);
    }

    String hashcode = hexFormat(System.identityHashCode(o), 8);
    tmpBuffer.append(hexServerIP);
    tmpBuffer.append(hashcode);

    long timeNow = System.currentTimeMillis();
    int timeLow = (int) timeNow & 0xFFFFFFFF;
    int node = seeder.nextInt();

    StringBuffer guid = new StringBuffer(32);
    guid.append(hexFormat(timeLow, 8));
    guid.append(tmpBuffer.toString());
    guid.append(hexFormat(node, 8));
    return guid.toString();
}