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Oracle® Coherence Java API Reference Release 3.6.1.0 E18814-01 |
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java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.net.AbstractPriorityTask
com.tangosol.util.processor.PriorityProcessor
public class PriorityProcessor
PriorityProcessor is used to explicitly control the scheduling priority and timeouts for execution of EntryProcessor-based methods.
For example, let's assume that there is a cache that belongs to a partitioned cache service configured with a task-timeout of 5 seconds. Also assume that there is a particular PreloadRequest processor that could take much longer to complete due to a large amount of database related processing. Then we could override the default task timeout value by using the PriorityProcessor as follows:PreloadRequest procStandard = PreloadRequest.INSTANCE; PriorityProcessor procPriority = new PriorityProcessor(procStandard); procPriority.setExecutionTimeoutMillis(PriorityTask.TIMEOUT_NONE); cache.processAll(setKeys, procPriority);This is an advanced feature which should be used judiciously.
Field Summary |
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Fields inherited from interface com.tangosol.net.PriorityTask |
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SCHEDULE_FIRST, SCHEDULE_IMMEDIATE, SCHEDULE_STANDARD, TIMEOUT_DEFAULT, TIMEOUT_NONE |
Constructor Summary | |
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PriorityProcessor() Default constructor (necessary for the ExternalizableLite interface). |
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PriorityProcessor(InvocableMap.EntryProcessor processor) Construct a PriorityProcessor. |
Method Summary | |
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InvocableMap.EntryProcessor |
getProcessor() Obtain the underlying processor. |
java.lang.Object |
process(InvocableMap.Entry entry) Process a Map.Entry object. |
java.util.Map |
processAll(java.util.Set setEntries) Process a Set of InvocableMap.Entry objects. |
void |
readExternal(java.io.DataInput in) Restore the contents of this object by loading the object's state from the passed DataInput object. |
void |
readExternal(PofReader in) Restore the contents of a user type instance by reading its state using the specified PofReader object. The AbstractPriorityTask implementation reserves property indexes 0 - 9. The PriorityProcessor implementation reserves property index 10. |
java.lang.String |
toString() Return a human-readable description for this PriorityProcessor. |
void |
writeExternal(java.io.DataOutput out) Save the contents of this object by storing the object's state into the passed DataOutput object. |
void |
writeExternal(PofWriter out) Save the contents of a POF user type instance by writing its state using the specified PofWriter object. The AbstractPriorityTask implementation reserves property indexes 0 - 9. The PriorityProcessor implementation reserves property index 10. |
Methods inherited from class com.tangosol.net.AbstractPriorityTask |
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getExecutionTimeoutMillis, getRequestTimeoutMillis, getSchedulingPriority, runCanceled, setExecutionTimeoutMillis, setRequestTimeoutMillis, setSchedulingPriority |
Methods inherited from class com.tangosol.util.BitHelper |
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countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString |
Constructor Detail |
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public PriorityProcessor()
public PriorityProcessor(InvocableMap.EntryProcessor processor)
processor
- the processor wrapped by this PriorityProcessorMethod Detail |
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public java.lang.Object process(InvocableMap.Entry entry)
process
in interface InvocableMap.EntryProcessor
entry
- the Entry to processpublic java.util.Map processAll(java.util.Set setEntries)
Map mapResults = new ListMap(); for (Iterator iter = setEntries.iterator(); iter.hasNext(); ) { Entry entry = (Entry) iter.next(); mapResults.put(entry.getKey(), process(entry)); } return mapResults;Note: if processAll() call throws an exception, entries that were removed from the setEntries would be considered successfully processed and corresponding changes will be made to the underlying Map.
processAll
in interface InvocableMap.EntryProcessor
setEntries
- a Set of InvocableMap.Entry objects to processpublic InvocableMap.EntryProcessor getProcessor()
public java.lang.String toString()
public void readExternal(java.io.DataInput in) throws java.io.IOException
readExternal
in interface ExternalizableLite
readExternal
in class AbstractPriorityTask
in
- the DataInput stream to read data from in order to restore the state of this objectjava.io.IOException
- if an I/O exception occursjava.io.NotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized intopublic void writeExternal(java.io.DataOutput out) throws java.io.IOException
writeExternal
in interface ExternalizableLite
writeExternal
in class AbstractPriorityTask
out
- the DataOutput stream to write the state of this object tojava.io.IOException
- if an I/O exception occurspublic void readExternal(PofReader in) throws java.io.IOException
The AbstractPriorityTask implementation reserves property indexes 0 - 9.
The PriorityProcessor implementation reserves property index 10.
readExternal
in interface PortableObject
readExternal
in class AbstractPriorityTask
in
- the PofReader from which to read the object's statejava.io.IOException
- if an I/O error occurspublic void writeExternal(PofWriter out) throws java.io.IOException
The AbstractPriorityTask implementation reserves property indexes 0 - 9.
The PriorityProcessor implementation reserves property index 10.
writeExternal
in interface PortableObject
writeExternal
in class AbstractPriorityTask
out
- the PofWriter to which to write the object's statejava.io.IOException
- if an I/O error occurs
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Oracle® Coherence Java API Reference Release 3.6.1.0 E18814-01 |
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