org.gridgain.grid.spi.eventstorage

Interface GridEventStorageSpi

All Superinterfaces:

GridSpi

All Known Implementing Classes:

GridMemoryEventStorageSpi

public interface GridEventStorageSpi
extends GridSpi

This SPI provides local node events storage. SPI allows for recording local node events and querying recorded local events. Every node during its life-cycle goes through a serious of events such as task deployment, task execution, job execution, etc. For performance reasons GridGain is designed to store all locally produced events locally. These events can be later retrieved using either distributed query:

• GridEvents.remoteQuery(GridPredicate, long, int...)

or local only query:

• GridEvents.localQuery(GridPredicate, int...)

NOTE: this SPI (i.e. methods in this interface) should never be used directly. SPIs provide internal view on the subsystem and is used internally by GridGain kernal. In rare use cases when access to a specific implementation of this SPI is required - an instance of this SPI can be obtained via Grid.configuration() method to check its configuration properties or call other non-SPI methods. Note again that calling methods from this interface on the obtained instance can lead to undefined behavior and explicitly not supported.

See Also:

GridEvent

Method Summary

Methods

Modifier and Type	Method and Description
<T extends GridEvent> Collection<T>	localEvents(GridPredicate<T> p) Queries locally-stored events only.
void	record(GridEvent evt) Records single event.

Methods inherited from interface org.gridgain.grid.spi.GridSpi

getName, getNodeAttributes, onContextDestroyed, onContextInitialized, spiStart, spiStop

Method Detail

localEvents

<T extends GridEvent> Collection<T> localEvents(GridPredicate<T> p)

Queries locally-stored events only. Events could be filtered out by given predicate filter.

Parameters:

p - Event predicate filter.

Returns:

Collection of events.

record

void record(GridEvent evt)
            throws GridSpiException

Records single event.

Parameters:

evt - Event that should be recorded.

Throws:

GridSpiException - If event recording failed for any reason.