UimaAsynchronousEngine (UIMA-AS: uima-as 2.3.1 API)

All Known Implementing Classes:

BaseUIMAAsynchronousEngine_impl, BaseUIMAAsynchronousEngineCommon_impl
```
public interface UimaAsynchronousEngine
```
A UimaAsynchronousEngine enables an application to send CASes for analysis to remote UIMA AS service. It provides a high level API and hides the detail of the transport implementation. The UIMA AS Client implementation uses JMS as its transport mechanism. Both synchronous and asynchronous processing is supported. For synchronous processing an application should call sendAndReceiveCAS(CAS) method. For asynchronous processing the application should call sendCAS(CAS) method. Additionally, processing with a client side CollectionReader is supported as well. The application first instantiates and initializes the CollectionReader and registers it via setCollectionReader(CollectionReader) method. Once the CollectionReader is registered, and initialize(Map) method is called, the application may call process() method.
This API enables the application to dynamically deploy UIMA AS services that it intends to use for processing. These services are deployed in a container and are collocated in the same JVM as the application. The services are considered private and used exclusively by the application. To deploy "private" services the application calls either deploy(String, Map) deploy(String[], Map) method, where the first parameter is either a single AS deployment descriptor or an array thereof. The application must deploy its "private" services *before* calling initialize(Map) method.
The application may stop the UIMA AS client in the middle of processing by calling stop() method.
Listeners can register with the UimaAsynchronousEngine by calling the addStatusCallbackListener(UimaAsBaseCallbackListener) method. These listeners receive status callbacks during the processing. An exception to that is the synchronous processing via sendAndReceiveCAS(CAS) method. This method returns either a CAS containing results of analysis or an exception. No callbacks are made while processing CASes synchronously.
An application may choose to implement parallelization of the processing, calling either sendAndReceiveCAS(CAS) or sendCAS(CAS) methods from multiple threads.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ApplicationContext` Deprecated.
`static String`	`ApplicationName` Name of an application that uses Uima AS client.
`static String`	`CasPoolSize` Size of Cas pool to create.
`static String`	`CpcTimeout` Collection Processing Complete timeout.
`static String`	`DD2SpringXsltFilePath` Path to the XSLT processor to use when processing a deployment descriptor.
`static String`	`Endpoint` Name of a queue where the Uima AS client sends JMS requests.
`static String`	`GetMetaTimeout` GetMeta timeout.
`static String`	`ReplyWindow` Deprecated.
`static String`	`SaxonClasspath` Saxon classpath to use when processing a deployment descriptor.
`static String`	`SerializationStrategy` Type of serialization to use when serializing CASes to remote Uima AS service.
`static String`	`ServerUri` Broker URL the Uima AS client will use to communicate with Uima AS service.
`static String`	`ShadowCasPoolSize` Deprecated.
`static String`	`SharedConnection` Deprecated.
`static String`	`Timeout` CAS process timeout.
`static String`	`UimaEeDebug` Debug flag to use when processing a deployment descriptor.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addStatusCallbackListener(UimaAsBaseCallbackListener aListener)` Registers application specific listener.
`void`	`collectionProcessingComplete()` Sends a Collection Processing Complete (CPC) request to a UIMA AS Service and blocks waiting for a reply.
`String`	`deploy(String[] aDeploymentDescriptorList, Map anApplicationContext)` Deploys a single UIMA AS container and all services defined in provided deployment descriptors.
`String`	`deploy(String aDeploymentDescriptor, Map anApplicationContext)` Deploys a UIMA AS container and all services defined in provided deployment descriptor.
`org.apache.uima.cas.CAS`	`getCAS()` Requests new CAS instance from a CAS pool.
`org.apache.uima.resource.metadata.ProcessingResourceMetaData`	`getMetaData()` Returns a `ProcessingResourceMetadata` received from the UIMA AS Service.
`String`	`getPerformanceReport()` Not implemented
`String`	`getSerializationStrategy()` Returns serialization strategy for the remote service.
`void`	`initialize(Map anApplicationContext)` Initializes UIMA asynchronous client using configuration parameters provided in a Map object.
`void`	`process()` Initiates processing of a collection.
`void`	`removeStatusCallbackListener(UimaAsBaseCallbackListener aListener)` Unregisters named application listener.
`String`	`sendAndReceiveCAS(org.apache.uima.cas.CAS aCAS)` This synchronous method sends a given CAS to a UIMA AS service and waits for response.
`String`	`sendCAS(org.apache.uima.cas.CAS aCAS)` Sends a given CAS for analysis to UIMA AS Service.
`void`	`setCollectionReader(org.apache.uima.collection.CollectionReader aCollectionReader)` Registers a `CollectionReader` instance to process a Collection.
`void`	`stop()` Stops the asynchronous client.
`void`	`stopProducingCases()` Request Uima AS client to initiate sending Stop requests to a service for all outstanding CASes awaiting reply.
`void`	`stopProducingCases(String aCasReferenceId)` Request Uima AS client to initiate sending Stop request to a service for a given CAS id If the service is a Cas Multiplier, it will stop producing new CASes, will wait until all child CASes finish and finally returns the input CAS.
`void`	`undeploy(String aSpringContainerId)` Undeploys specified UIMA AS container and all services running within it.
`void`	`undeploy(String aSpringContainerId, int stop_level)` Undeploys specified UIMA AS container and all services running within it.

- Field Detail
  - ApplicationContext
```
static final String ApplicationContext
```
    Deprecated.
    
    See Also:
    Constant Field Values
  - ApplicationName
```
static final String ApplicationName
```
    Name of an application that uses Uima AS client. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map) .This name is used to register Uima AS client MBean with JMX. To make the name unique, provided string is prepended to a UUID to form _www_xxxx_yyyy_zzzz
    
    See Also:
    Constant Field Values
  - ServerUri
```
static final String ServerUri
```
    Broker URL the Uima AS client will use to communicate with Uima AS service. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Required. If omitted, the Uima AS client throws ResourceInitializationException
    
    See Also:
    Constant Field Values
  - Endpoint
```
static final String Endpoint
```
    Name of a queue where the Uima AS client sends JMS requests. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Required. If omitted, the Uima AS client throws ResourceInitializationException
    
    See Also:
    Constant Field Values
  - CasPoolSize
```
static final String CasPoolSize
```
    Size of Cas pool to create. This parameter determines how many CASes can be processed concurrently. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Optional. If omitted, the Uima AS client will use 1 as a default.
    
    See Also:
    Constant Field Values
  - ShadowCasPoolSize
```
static final String ShadowCasPoolSize
```
    Deprecated.
    
    See Also:
    Constant Field Values
  - ReplyWindow
```
static final String ReplyWindow
```
    Deprecated.
    
    See Also:
    Constant Field Values
  - Timeout
```
static final String Timeout
```
    CAS process timeout. The max amount of time allowed to process a CAS. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Optional. If omitted, the Uima AS client defaults to no timeout.
    
    See Also:
    Constant Field Values
  - CpcTimeout
```
static final String CpcTimeout
```
    Collection Processing Complete timeout. The max amount of time allowed to process CPC request.The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Optional. If omitted, the Uima AS client defaults to no timeout.
    
    See Also:
    Constant Field Values
  - GetMetaTimeout
```
static final String GetMetaTimeout
```
    GetMeta timeout. The max amount of time allowed to process GetMeta request.The application provides it to the Uima AS client in a Map which is an argument in initialize(Map). Optional. If omitted, the Uima AS client defaults to 60 seconds.
    
    See Also:
    Constant Field Values
  - DD2SpringXsltFilePath
```
static final String DD2SpringXsltFilePath
```
    Path to the XSLT processor to use when processing a deployment descriptor. The application provides it to the Uima AS client via System property, either on a command line using -D, or explicitly by using java's System.setProperty(DD2SpringXsltFilePath,). This path is required only if the Uima AS Client is used to deploy Uima AS service.
    
    See Also:
    Constant Field Values
  - SaxonClasspath
```
static final String SaxonClasspath
```
    Saxon classpath to use when processing a deployment descriptor. The application provides it to the Uima AS client via System property, either on a command line using -D, or explicitly by using java's System.setProperty(SaxonClasspath,). This path is required only if the Uima AS Client is used to deploy Uima AS service.
    
    See Also:
    Constant Field Values
  - UimaEeDebug
```
static final String UimaEeDebug
```
    Debug flag to use when processing a deployment descriptor. If set, the dd2spring processor will not remove generated spring configuration file on client exit. The application provides it to the Uima AS client via System property, either on a command line using -D, or explicitly by using java's System.setProperty(UimaEeDebug,). This setting is only relevant if the Uima AS Client is used to deploy Uima AS service.
    
    See Also:
    Constant Field Values
  - SerializationStrategy
```
static final String SerializationStrategy
```
    Type of serialization to use when serializing CASes to remote Uima AS service. Valid serialization types are: xmi or binary. If this setting is omitted, the Uima AS client uses xmi as a default. The application provides it to the Uima AS client in a Map which is an argument in initialize(Map)
    
    See Also:
    Constant Field Values
  - SharedConnection
```
static final String SharedConnection
```
    Deprecated.
    
    See Also:
    Constant Field Values
- Method Detail
  - initialize
```
void initialize(Map anApplicationContext)
                throws org.apache.uima.resource.ResourceInitializationException
```
    Initializes UIMA asynchronous client using configuration parameters provided in a Map object. It creates a connection to a service queue managed by a Broker as specified in the parameters. A temporary reply queue is also created with a JMS listener attached to it. Once the connections are made and the listener is started the method sends getMeta request to the UIMA AS service and waits for a response. When the reply to getMeta is received the UIMA AS client is fully initialized and notifies an application by calling UimaASStatusCallbackListener.initializationComplete(EntityProcessStatus) on the application listener.
    
    Parameters:
    anApplicationContext - - configuration containing UIMA EE Service Broker URI, service queue name, timeout value, reply window size, and CAS Pool size.
    
    Throws:
    
    org.apache.uima.resource.ResourceInitializationException
  - setCollectionReader
```
void setCollectionReader(org.apache.uima.collection.CollectionReader aCollectionReader)
                         throws org.apache.uima.resource.ResourceInitializationException
```
    Registers a CollectionReader instance to process a Collection. This method must be called first, before calling process() method.
    
    Parameters:
    aCollectionReader - - instance of a CollectionReader
    
    Throws:
    
    org.apache.uima.resource.ResourceInitializationException
  - addStatusCallbackListener
```
void addStatusCallbackListener(UimaAsBaseCallbackListener aListener)
```
    Registers application specific listener. Via this listener the application receives call-backs. More than one listener can be added.
    
    Parameters:
    aListener - - application listener object to add
  - removeStatusCallbackListener
```
void removeStatusCallbackListener(UimaAsBaseCallbackListener aListener)
```
    Unregisters named application listener.
    
    Parameters:
    aListener - - application listener to remove
  - stop
```
void stop()
          throws Exception
```
    Stops the asynchronous client. Cleans up resources, drops connection to UIMA AS service queue and stops listening on a response queue.
    
    Throws:
    
    Exception
  - getPerformanceReport
```
String getPerformanceReport()
```
    Not implemented
    
    Returns:
    null
  - process
```
void process()
             throws org.apache.uima.resource.ResourceProcessException
```
    Initiates processing of a collection. This method should be only called after initialize() has been called and an instance of a CollectionReader is provided via setCollectionReader(CollectionReader). This method blocks until the CollectionReader finishes processing the entire collection. Status of the processing can be obtained by registering a listener with the addStatusCallbackListener(UimaAsBaseCallbackListener) method.
    The method is synchronized to allow processing of only one collection at a time. The application must wait with processing another collection until it receives notification via a listener UimaASStatusCallbackListener.collectionProcessComplete(EntityProcessStatus aStatus)
    
    Throws:
    
    org.apache.uima.resource.ResourceProcessException - - if there is a problem processing the Collection
  - sendCAS
```
String sendCAS(org.apache.uima.cas.CAS aCAS)
               throws org.apache.uima.resource.ResourceProcessException
```
    Sends a given CAS for analysis to UIMA AS Service. This method may block if the client is configured to use a reply window which prevents sending too many CASes to the service. Assuming the window is large enough to send the CAS, this method returns as soon as the CAS is sent. Before sending the CAS, a timer starts that will expire if a reply doesn't arrive in a given interval.
    
    Parameters:
    aCAS - - a CAS to analyze.
    
    Returns:
    - returns a unique identifier associated with the sent CAS
    
    Throws:
    
    org.apache.uima.resource.ResourceProcessException
  - getCAS
```
org.apache.uima.cas.CAS getCAS()
                               throws Exception
```
    Requests new CAS instance from a CAS pool. This method blocks until a free instance of CAS is available in a CAS pool.
    
    Returns:
    - new CAS instance fetched from the CAS pool
    
    Throws:
    
    Exception
  - collectionProcessingComplete
```
void collectionProcessingComplete()
                                  throws org.apache.uima.resource.ResourceProcessException
```
    Sends a Collection Processing Complete (CPC) request to a UIMA AS Service and blocks waiting for a reply. The method blocks until the service replies or a timeout occurs. Before returning, this method will notify an application of completing the Collection Processing Complete request using registered listener
    
    Throws:
    
    org.apache.uima.resource.ResourceProcessException
  - getMetaData
```
org.apache.uima.resource.metadata.ProcessingResourceMetaData getMetaData()
                                                                         throws org.apache.uima.resource.ResourceInitializationException
```
    Returns a ProcessingResourceMetadata received from the UIMA AS Service. The metadata is obtained from the service during initialization. returns - an ProcessingResourceMetadata received from an asynchronous Analysis Engine service, or null if initialize() has not yet been called.
    
    Throws:
    
    org.apache.uima.resource.ResourceInitializationException
  - sendAndReceiveCAS
```
String sendAndReceiveCAS(org.apache.uima.cas.CAS aCAS)
                         throws org.apache.uima.resource.ResourceProcessException
```
    This synchronous method sends a given CAS to a UIMA AS service and waits for response. The method either returns a CAS with the result of analysis or throws an exception. It doesn't use call-backs through a registered application listener.
    
    Parameters:
    aCAS - - a CAS to analyze.
    
    Returns:
    - a unique id assigned to the CAS
    
    Throws:
    
    org.apache.uima.resource.ResourceProcessException
  - deploy
```
String deploy(String aDeploymentDescriptor,
            Map anApplicationContext)
              throws Exception
```
    Deploys a UIMA AS container and all services defined in provided deployment descriptor. Each deployment descriptor contains an assembly of related UIMA AS services. This method is synchronous and will block until all UIMA AS services are completely deployed and initialized. If there is a problem deploying any of the UIMA AS services the container is destroyed and exception thrown.
    
    Parameters:
    aDeploymentDescriptor - - a deployment descriptor to deploy in a container.
    anApplicationContext - - initialization parameters needed to configure the client and services
    
    Returns:
    - the id of the container in which the UIMA AS services were deployed
    
    Throws:
    
    Exception - - if there was a problem deploying the container or UIMA AS services.
  - deploy
```
String deploy(String[] aDeploymentDescriptorList,
            Map anApplicationContext)
              throws Exception
```
    Deploys a single UIMA AS container and all services defined in provided deployment descriptors. Each deployment descriptor contains an assembly of related UIMA AS services. This method is synchronous and will block until all UIMA AS services are completely deployed and initialized. If there is a problem deploying any of the UIMA AS services the container is destroyed and exception thrown.
    
    Parameters:
    aDeploymentDescriptorList - - a list of deployment descriptors to deploy in a container.
    anApplicationContext - - initialization parameters needed to configure the client and services
    
    Returns:
    - the id of the container in which the UIMA AS services were deployed
    
    Throws:
    
    Exception - - if there was a problem deploying the container or UIMA AS services.
  - undeploy
```
void undeploy(String aSpringContainerId)
              throws Exception
```
    Undeploys specified UIMA AS container and all services running within it. Each UIMA AS container has a unique id assigned to it during the deploy phase. This method is synchronous and will block until the container (and all services contained within it) is destroyed.
    
    Parameters:
    aSpringContainerId - - an id of the container to be destroyed.
    
    Throws:
    
    Exception
  - undeploy
```
void undeploy(String aSpringContainerId,
            int stop_level)
              throws Exception
```
    Undeploys specified UIMA AS container and all services running within it. Each UIMA AS container has a unique id assigned to it during the deploy phase. This method is synchronous and will block until the container (and all services contained within it) is destroyed.
    
    Parameters:
    aSpringContainerId - - an id of the container to be destroyed.
    
    Throws:
    
    Exception
  - getSerializationStrategy
```
String getSerializationStrategy()
```
    Returns serialization strategy for the remote service. All CASes will be serialized according to the specified serialization. Either xmi or binary
    
    Returns:
    String type of serialization for CASes
  - stopProducingCases
```
void stopProducingCases()
```
    Request Uima AS client to initiate sending Stop requests to a service for all outstanding CASes awaiting reply.
  - stopProducingCases
```
void stopProducingCases(String aCasReferenceId)
```
    Request Uima AS client to initiate sending Stop request to a service for a given CAS id If the service is a Cas Multiplier, it will stop producing new CASes, will wait until all child CASes finish and finally returns the input CAS.

Interface UimaAsynchronousEngine

Field Summary

Method Summary

Field Detail

ApplicationContext

ApplicationName

ServerUri

Endpoint

CasPoolSize

ShadowCasPoolSize

ReplyWindow

Timeout

CpcTimeout

GetMetaTimeout

DD2SpringXsltFilePath

SaxonClasspath

UimaEeDebug

SerializationStrategy

SharedConnection

Method Detail

initialize

setCollectionReader

addStatusCallbackListener

removeStatusCallbackListener

stop

getPerformanceReport

process

sendCAS

getCAS

collectionProcessingComplete

getMetaData

sendAndReceiveCAS

deploy

deploy

undeploy

undeploy

getSerializationStrategy

stopProducingCases

stopProducingCases