|
Oracle® Fusion Middleware Java API Reference for Oracle Coherence 12c (12.1.3.0.0) E47890-01 |
|||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object
com.tangosol.util.Base
com.tangosol.util.SegmentedHashMap.Entry
com.tangosol.util.SegmentedConcurrentMap.LockableEntry
public class SegmentedConcurrentMap.LockableEntry
LockableEntry is an Entry that supports locking. See ConcurrentMap
Field Summary | |
---|---|
protected short |
m_cContend The number of threads that are waiting to lock this Entry. |
protected short |
m_cLock The lock count (number of times the "lock()" was called by the locking thread). |
protected java.lang.Object |
m_oLockHolder The lock holder object. |
Fields inherited from class com.tangosol.util.SegmentedHashMap.Entry |
---|
m_eNext, m_nHash, m_oKey, m_oValue |
Constructor Summary | |
---|---|
protected |
SegmentedConcurrentMap.LockableEntry(java.lang.Object oKey, java.lang.Object oValue, int nHash) Construct a LockableEntry for the given entry. |
Method Summary | |
---|---|
protected boolean |
casValueInternal(java.lang.Object oValueAssume, java.lang.Object oValue) Set the value of this entry to the specified value iff the current value matches the assumed value. |
java.lang.Object |
getLockHolder() Return the holder of this lockable entry, or null if this entry is not locked. |
boolean |
isContended() Is there contention (a thread waiting) to lock this Entry? |
protected boolean |
isLocked() Is this entry Locked? |
protected boolean |
isSynthetic() Is this Entry synthetic? |
protected void |
lock(java.lang.Object oHolder) Lock this entry for the specified lock holder. |
protected java.lang.Object |
setValueInternal(java.lang.Object oValue) Replaces the value corresponding to this entry with the specified value (writes through to the map). |
java.lang.String |
toString() Render the map entry as a String. |
protected boolean |
unlock() Unlock this entry. |
protected long |
waitForNotify(long cWait) Wait for this LockableEntry to be notified that it has been freed by the previous lock-holder. |
Methods inherited from class com.tangosol.util.SegmentedHashMap.Entry |
---|
equals, getKey, getValue, getValueInternal, hashCode, nextEntry, nextEntry, setNext, setValue |
Field Detail |
---|
protected volatile java.lang.Object m_oLockHolder
protected volatile short m_cLock
protected volatile short m_cContend
Constructor Detail |
---|
protected SegmentedConcurrentMap.LockableEntry(java.lang.Object oKey, java.lang.Object oValue, int nHash)
oKey
- key with which the specified value is to be associatedoValue
- value to be associated with the specified keynHash
- the hashCode for the specified keyMethod Detail |
---|
public java.lang.Object getLockHolder()
public boolean isContended()
protected java.lang.Object setValueInternal(java.lang.Object oValue)
setValueInternal
in class SegmentedHashMap.Entry
oValue
- new value to be stored in this entryprotected boolean isSynthetic()
isSynthetic
in class SegmentedHashMap.Entry
protected long waitForNotify(long cWait)
Note: caller of this method is expected to hold a synchronization monitor for this LockableEntry object while making this call.
cWait
- the number of milliseconds to wait for notification to obtain a lock; pass zero to return immediately; pass -1 to block the calling thread until the lock could be obtainedprotected void lock(java.lang.Object oHolder)
Note: caller of this method is expected to have locked the segment for this Entry object
oHolder
- the holder of this lockprotected boolean unlock()
Note: caller of this method is expected to have locked the segment for this Entry object
protected boolean casValueInternal(java.lang.Object oValueAssume, java.lang.Object oValue)
oValueAssume
- the assumed valueoValue
- the new valuepublic java.lang.String toString()
toString
in class SegmentedHashMap.Entry
protected boolean isLocked()
|
Oracle® Fusion Middleware Java API Reference for Oracle Coherence 12c (12.1.3.0.0) E47890-01 |
|||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |