Object

org.apache.predictionio.data.store.java

LJavaEventStore

Related Doc: package java

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object LJavaEventStore

This Java-friendly object provides a set of operation to access Event Store without going through Spark's parallelization.

Note that blocking methods of this object uses scala.concurrent.ExecutionContext.Implicits.global internally. Since this is a thread pool which has a number of threads equal to available processors, parallelism is limited up to the number of processors.

If this limitation become bottleneck of resource usage, you can increase the number of threads by declaring following VM options before calling "pio deploy":

export JAVA_OPTS="$JAVA_OPTS \
  -Dscala.concurrent.context.numThreads=1000 \
  -Dscala.concurrent.context.maxThreads=1000"

You can learn more about the global execution context in the Scala documentation: https://docs.scala-lang.org/overviews/core/futures.html#the-global-execution-context

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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  4. final def asInstanceOf[T0]: T0

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  8. def finalize(): Unit

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  9. def find(appName: String, entityType: Option[String], entityId: Option[String], channelName: Option[String], eventNames: Option[List[String]], targetEntityType: Option[Option[String]], targetEntityId: Option[Option[String]], startTime: Option[DateTime], untilTime: Option[DateTime], limit: Option[Integer], timeout: Duration): List[Event]

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    Reads events generically.

    Reads events generically. If entityType or entityId is not specified, it results in table scan.

    appName

    return events of this app

    entityType

    return events of this entityType

    • None means no restriction on entityType
    • Some(x) means entityType should match x.
    entityId

    return events of this entityId

    • None means no restriction on entityId
    • Some(x) means entityId should match x.
    channelName

    return events of this channel (default channel if it's None)

    eventNames

    return events with any of these event names.

    targetEntityType

    return events of this targetEntityType:

    • None means no restriction on targetEntityType
    • Some(None) means no targetEntityType for this event
    • Some(Some(x)) means targetEntityType should match x.
    targetEntityId

    return events of this targetEntityId

    • None means no restriction on targetEntityId
    • Some(None) means no targetEntityId for this event
    • Some(Some(x)) means targetEntityId should match x.
    startTime

    return events with eventTime >= startTime

    untilTime

    return events with eventTime < untilTime

    limit

    Limit number of events. Get all events if None or Some(-1)

    returns

    java.util.List[Event]

  10. def findAsync(appName: String, entityType: Option[String], entityId: Option[String], channelName: Option[String], eventNames: Option[List[String]], targetEntityType: Option[Option[String]], targetEntityId: Option[Option[String]], startTime: Option[DateTime], untilTime: Option[DateTime], limit: Option[Integer], executorService: ExecutorService): CompletableFuture[List[Event]]

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    Reads events generically.

    Reads events generically. If entityType or entityId is not specified, it results in table scan.

    appName

    return events of this app

    entityType

    return events of this entityType

    • None means no restriction on entityType
    • Some(x) means entityType should match x.
    entityId

    return events of this entityId

    • None means no restriction on entityId
    • Some(x) means entityId should match x.
    channelName

    return events of this channel (default channel if it's None)

    eventNames

    return events with any of these event names.

    targetEntityType

    return events of this targetEntityType:

    • None means no restriction on targetEntityType
    • Some(None) means no targetEntityType for this event
    • Some(Some(x)) means targetEntityType should match x.
    targetEntityId

    return events of this targetEntityId

    • None means no restriction on targetEntityId
    • Some(None) means no targetEntityId for this event
    • Some(Some(x)) means targetEntityId should match x.
    startTime

    return events with eventTime >= startTime

    untilTime

    return events with eventTime < untilTime

    limit

    Limit number of events. Get all events if None or Some(-1)

    returns

    CompletableFuture[java.util.List[Event]]

  11. def findByEntity(appName: String, entityType: String, entityId: String, channelName: Option[String], eventNames: Option[List[String]], targetEntityType: Option[Option[String]], targetEntityId: Option[Option[String]], startTime: Option[DateTime], untilTime: Option[DateTime], limit: Option[Integer], latest: Boolean, timeout: Duration): List[Event]

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    Reads events of the specified entity.

    Reads events of the specified entity. May use this in Algorithm's predict() or Serving logic to have fast event store access.

    appName

    return events of this app

    entityType

    return events of this entityType

    entityId

    return events of this entityId

    channelName

    return events of this channel (default channel if it's None)

    eventNames

    return events with any of these event names.

    targetEntityType

    return events of this targetEntityType:

    • None means no restriction on targetEntityType
    • Some(None) means no targetEntityType for this event
    • Some(Some(x)) means targetEntityType should match x.
    targetEntityId

    return events of this targetEntityId

    • None means no restriction on targetEntityId
    • Some(None) means no targetEntityId for this event
    • Some(Some(x)) means targetEntityId should match x.
    startTime

    return events with eventTime >= startTime

    untilTime

    return events with eventTime < untilTime

    limit

    Limit number of events. Get all events if None or Some(-1)

    latest

    Return latest event first

    returns

    java.util.List[Event]

  12. def findByEntityAsync(appName: String, entityType: String, entityId: String, channelName: Option[String], eventNames: Option[List[String]], targetEntityType: Option[Option[String]], targetEntityId: Option[Option[String]], startTime: Option[DateTime], untilTime: Option[DateTime], limit: Option[Integer], latest: Boolean, executorService: ExecutorService): CompletableFuture[List[Event]]

    Permalink

    Reads events of the specified entity.

    Reads events of the specified entity. May use this in Algorithm's predict() or Serving logic to have fast event store access.

    appName

    return events of this app

    entityType

    return events of this entityType

    entityId

    return events of this entityId

    channelName

    return events of this channel (default channel if it's None)

    eventNames

    return events with any of these event names.

    targetEntityType

    return events of this targetEntityType:

    • None means no restriction on targetEntityType
    • Some(None) means no targetEntityType for this event
    • Some(Some(x)) means targetEntityType should match x.
    targetEntityId

    return events of this targetEntityId

    • None means no restriction on targetEntityId
    • Some(None) means no targetEntityId for this event
    • Some(Some(x)) means targetEntityId should match x.
    startTime

    return events with eventTime >= startTime

    untilTime

    return events with eventTime < untilTime

    limit

    Limit number of events. Get all events if None or Some(-1)

    latest

    Return latest event first

    returns

    CompletableFuture[java.util.List[Event]]

  13. final def getClass(): Class[_]

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  14. def hashCode(): Int

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  17. final def notify(): Unit

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  18. final def notifyAll(): Unit

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  19. final def synchronized[T0](arg0: ⇒ T0): T0

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  20. def toString(): String

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  21. final def wait(): Unit

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  22. final def wait(arg0: Long, arg1: Int): Unit

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  23. final def wait(arg0: Long): Unit

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