com.newrelic.agent.service

Class ServiceUtils

java.lang.Object

com.newrelic.agent.service.ServiceUtils

public class ServiceUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ServiceUtils()

Method Summary

Modifier and Type	Method and Description
static int	calculatePathHash(java.lang.String appName, java.lang.String txName, java.lang.Integer optionalReferringPathHash)
static int	hexStringToInt(java.lang.String val)
static java.lang.String	intToHexString(int val)
static void	readMemoryBarrier(java.util.concurrent.atomic.AtomicInteger i) Call before reading from shared variable.
static int	reversePathHash(java.lang.String appName, java.lang.String txName, java.lang.Integer optionalReferringPathHash)
static void	writeMemoryBarrier(java.util.concurrent.atomic.AtomicInteger i) Call after writing to shared variable.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServiceUtils

public ServiceUtils()

Method Detail

calculatePathHash

public static int calculatePathHash(java.lang.String appName,
                                    java.lang.String txName,
                                    java.lang.Integer optionalReferringPathHash)

reversePathHash

public static int reversePathHash(java.lang.String appName,
                                  java.lang.String txName,
                                  java.lang.Integer optionalReferringPathHash)

intToHexString

public static java.lang.String intToHexString(int val)

hexStringToInt

public static int hexStringToInt(java.lang.String val)

readMemoryBarrier

public static void readMemoryBarrier(java.util.concurrent.atomic.AtomicInteger i)

Call before reading from shared variable. When reading and writing to shared non-volatiles, such as an array, it is necessary to force a memory barrier so the changes are visible to other threads. This method reads the AtomicInteger value which is implemented as a volatile. This triggers a read barrier. Additional logic is added to ensure the JVM can't optimize out this read.

Parameters:

i -

writeMemoryBarrier

public static void writeMemoryBarrier(java.util.concurrent.atomic.AtomicInteger i)

Call after writing to shared variable. When reading and writing to shared non-volatiles, such as an array, it is necessary to force a memory barrier so the changes are visible to other threads. This method increments the AtomicInteger value which is implemented as a volatile. This triggers a write barrier.

Parameters:

i -