Package org.apache.derby.iapi.store.raw
Class ContainerKey
java.lang.Object
org.apache.derby.iapi.store.raw.ContainerKey
A key that identifies a Container within the RawStore.
MT - Immutable
MT - Immutable
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
long
Return my identifier within the segmentlong
Return my segment identifierint
hashCode()
boolean
lockAttributes
(int flag, Hashtable<String, Object> attributes) This lockable wants to participate in the Virtual Lock table.boolean
This method will only be called if requestCompatible returned false.void
Note the fact the object is locked.boolean
Return true if the passed in object matches this object.static ContainerKey
read
(ObjectInput in) boolean
requestCompatible
(Object requestedQualifier, Object grantedQualifier) Return true if the requested qualifier is compatible with the already granted qualifier.toString()
void
unlockEvent
(Latch lockInfo) Note that the object has been unlockedvoid
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Field Details
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segmentId
private final long segmentId -
containerId
private final long containerId
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Constructor Details
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ContainerKey
public ContainerKey(long segmentId, long containerId) Create a new ContainerKey
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Method Details
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getContainerId
public long getContainerId()Return my identifier within the segment -
getSegmentId
public long getSegmentId()Return my segment identifier -
writeExternal
- Throws:
IOException
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read
- Throws:
IOException
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equals
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hashCode
public int hashCode() -
toString
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match
Description copied from interface:Matchable
Return true if the passed in object matches this object. -
lockEvent
Description copied from interface:Lockable
Note the fact the object is locked. Performs required actions to ensure that unlockEvent() work correctly. This method does not actually perform any locking of the object, the locking mechanism is provided by the lock manager.If the class supports multiple lockers of the object then this method will be called once per locker, each with their own qualifier.
Must only be called by the lock manager. Synchronization will be handled by the lock manager.
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requestCompatible
Description copied from interface:Lockable
Return true if the requested qualifier is compatible with the already granted qualifier.- Specified by:
requestCompatible
in interfaceLockable
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lockerAlwaysCompatible
public boolean lockerAlwaysCompatible()This method will only be called if requestCompatible returned false. This results from two cases, some other compatabilty space has some lock that would conflict with the request, or this compatability space has a lock tha- Specified by:
lockerAlwaysCompatible
in interfaceLockable
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unlockEvent
Description copied from interface:Lockable
Note that the object has been unlockedMust only be called by the lock manager. Synchronization will be handled by the lock manager.
- Specified by:
unlockEvent
in interfaceLockable
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lockAttributes
This lockable wants to participate in the Virtual Lock table.- Specified by:
lockAttributes
in interfaceLockable
- Parameters:
flag
- use the bits in this int to decide if the user is interested in this kind of lockable object. The bits are defined in VirtualLockTable. For instance, the user may only ask for TABLE_AND_ROWLOCK and if this is not a table or row lock, then don't participate.attributes
- if this decides to participate, put all relevant attributes into the Hashtable. The complete list of interesting attributes is listed in VirtualLockTable. The following attributes must be present for all participating lockables: VirtualLockTable.LOCKNAME, VirtualLockTable.LOCKTYPE, either VirtualLockTable.CONTAINERID or VirtualLockTable.CONGLOMID,MT - this routine must be MP safe, caller will not be single threading the lock manager.
- Returns:
- true if this object has diagnostic information to add to the virtual lock table. If this object either does not want to participate in the diagnostic virtual lock table or none of the attributes requested are attributes of this lock, returns false.
- See Also:
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