org.apache.ignite.thread

Class IgniteThread

java.lang.Object

java.lang.Thread

org.apache.ignite.thread.IgniteThread

All Implemented Interfaces:

Runnable

Direct Known Subclasses:

IgniteSpiThread

public class IgniteThread
extends Thread

This class adds some necessary plumbing on top of the Thread class. Specifically, it adds:

• Consistent naming of threads
• Dedicated parent thread group
• Backing interrupted flag
• Name of the grid this thread belongs to

Note: this class is intended for internal use only.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
static int	GRP_IDX_UNASSIGNED Index for unassigned thread.
protected String	igniteInstanceName The name of the Ignite instance this thread belongs to.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Modifier	Constructor and Description
	IgniteThread(org.apache.ignite.internal.util.worker.GridWorker worker) Creates thread with given worker.
	IgniteThread(String igniteInstanceName, String threadName, Runnable r) Creates grid thread with given name for a given Ignite instance.
	IgniteThread(String igniteInstanceName, String threadName, Runnable r, int grpIdx, int stripe, byte plc) Creates grid thread with given name for a given Ignite instance with specified thread group.
protected	IgniteThread(String igniteInstanceName, ThreadGroup threadGrp, String threadName)

Method Summary

Modifier and Type	Method and Description
boolean	cachePoolThread()
int	compositeRwLockIndex()
void	compositeRwLockIndex(int compositeRwLockIdx)
protected static String	createName(long num, String threadName, String igniteInstanceName) Creates new thread name.
static IgniteThread	current()
String	getIgniteInstanceName() Gets name of the Ignite instance this thread belongs to.
boolean	isForbiddenToRequestBinaryMetadata()
static void	onEntryProcessorEntered(boolean holdsTopLock) Callback before entry processor execution is started.
static void	onEntryProcessorLeft() Callback after entry processor execution is finished.
static void	onForbidBinaryMetadataRequestSectionEntered() Callback on entering critical section where binary metadata requests are forbidden.
static void	onForbidBinaryMetadataRequestSectionLeft() Callback on leaving critical section where binary metadata requests are forbidden.
byte	policy()
int	stripe()
String	toString()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, run, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, yield

Methods inherited from class java.lang.Object

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

Field Detail

GRP_IDX_UNASSIGNED

public static final int GRP_IDX_UNASSIGNED

Index for unassigned thread.

See Also:

Constant Field Values

igniteInstanceName

protected final String igniteInstanceName

The name of the Ignite instance this thread belongs to.

Constructor Detail

IgniteThread

public IgniteThread(org.apache.ignite.internal.util.worker.GridWorker worker)

Creates thread with given worker.

Parameters:

worker - Runnable to create thread with.

IgniteThread

public IgniteThread(String igniteInstanceName,
                    String threadName,
                    Runnable r)

Creates grid thread with given name for a given Ignite instance.

Parameters:

igniteInstanceName - Name of the Ignite instance this thread is created for.

threadName - Name of thread.

r - Runnable to execute.

IgniteThread

public IgniteThread(String igniteInstanceName,
                    String threadName,
                    Runnable r,
                    int grpIdx,
                    int stripe,
                    byte plc)

Creates grid thread with given name for a given Ignite instance with specified thread group.

Parameters:

igniteInstanceName - Name of the Ignite instance this thread is created for.

threadName - Name of thread.

r - Runnable to execute.

grpIdx - Thread index within a group.

stripe - Non-negative stripe number if this thread is striped pool thread.

IgniteThread

protected IgniteThread(String igniteInstanceName,
                       ThreadGroup threadGrp,
                       String threadName)

Parameters:

igniteInstanceName - Name of the Ignite instance this thread is created for.

threadGrp - Thread group.

threadName - Name of thread.

Method Detail

policy

public byte policy()

Returns:

Related GridIoPolicy for internal Ignite pools.

stripe

public int stripe()

Returns:

Non-negative stripe number if this thread is striped pool thread.

cachePoolThread

public boolean cachePoolThread()

Returns:

True if thread belongs to pool processing cache operations.

getIgniteInstanceName

public String getIgniteInstanceName()

Gets name of the Ignite instance this thread belongs to.

Returns:

Name of the Ignite instance this thread belongs to.

compositeRwLockIndex

public int compositeRwLockIndex()

Returns:

Composite RW lock index.

compositeRwLockIndex

public void compositeRwLockIndex(int compositeRwLockIdx)

Parameters:

compositeRwLockIdx - Composite RW lock index.

isForbiddenToRequestBinaryMetadata

public boolean isForbiddenToRequestBinaryMetadata()

Returns:

True if thread is not allowed to request binary metadata to avoid potential deadlock.

onEntryProcessorEntered

public static void onEntryProcessorEntered(boolean holdsTopLock)

Callback before entry processor execution is started.

onEntryProcessorLeft

public static void onEntryProcessorLeft()

Callback after entry processor execution is finished.

onForbidBinaryMetadataRequestSectionEntered

public static void onForbidBinaryMetadataRequestSectionEntered()

Callback on entering critical section where binary metadata requests are forbidden.

onForbidBinaryMetadataRequestSectionLeft

public static void onForbidBinaryMetadataRequestSectionLeft()

Callback on leaving critical section where binary metadata requests are forbidden.

current

public static IgniteThread current()

Returns:

IgniteThread or null if current thread is not an instance of IgniteThread.

createName

protected static String createName(long num,
                                   String threadName,
                                   String igniteInstanceName)

Creates new thread name.

Parameters:

num - Thread number.

threadName - Thread name.

igniteInstanceName - Ignite instance name.

Returns:

New thread name.

toString

public String toString()

Overrides:

toString in class Thread