org.apache.stanbol.enhancer.engines.restful.nlp.impl
Class RestfulNlpAnalysisEngine

java.lang.Object
  org.apache.stanbol.enhancer.servicesapi.impl.AbstractEnhancementEngine<IOException,RuntimeException>
      org.apache.stanbol.enhancer.engines.restful.nlp.impl.RestfulNlpAnalysisEngine

All Implemented Interfaces:

org.apache.stanbol.enhancer.servicesapi.EnhancementEngine, org.apache.stanbol.enhancer.servicesapi.ServiceProperties

@Service
@Properties(value={@Property(name="stanbol.enhancer.engine.name",value="changeme"),@Property(name="enhancer.engine.restful.nlp.languages",value="*",cardinality=2147483647),@Property(name="enhancer.engine.restful.nlp.analysis.service",value="http://changeme"),@Property(name="enhancer.engine.restful.nlp.analysis.service.user",value=""),@Property(name="enhancer.engine.restful.nlp.analysis.service.pwd",value=""),@Property(name="service.ranking",intValue=0)})
public class RestfulNlpAnalysisEngine
extends org.apache.stanbol.enhancer.servicesapi.impl.AbstractEnhancementEngine<IOException,RuntimeException>
implements org.apache.stanbol.enhancer.servicesapi.ServiceProperties

An enhancement engine that uses a RESTful service for NLP processing of the pain text content part of processed ContentItems.

The RESTful API of the remote service is standardised by STANBOL-892

Author:

Rupert Westenthaler

Nested Class Summary

protected class

RestfulNlpAnalysisEngine.AnalysisResponseHandler

Field Summary

static String	ANALYSIS_SERVICE_PWD The User for the remote analyses service
static String	ANALYSIS_SERVICE_URL The URI for the remote analyses service
static String	ANALYSIS_SERVICE_USER The User for the remote analyses service
static String	CONFIG_LANGUAGES Language configuration.
protected org.apache.http.impl.client.DefaultHttpClient	httpClient

Fields inherited from interface org.apache.stanbol.enhancer.servicesapi.ServiceProperties

ENHANCEMENT_ENGINE_ORDERING, ORDERING_CONTENT_EXTRACTION, ORDERING_DEFAULT, ORDERING_EXTRACTION_ENHANCEMENT, ORDERING_NLP_CHUNK, ORDERING_NLP_LANGAUGE_DETECTION, ORDERING_NLP_LEMMATIZE, ORDERING_NLP_POS, ORDERING_NLP_SENTENCE_DETECTION, ORDERING_NLP_TOKENIZING, ORDERING_POST_PROCESSING, ORDERING_PRE_PROCESSING

Fields inherited from interface org.apache.stanbol.enhancer.servicesapi.EnhancementEngine

CANNOT_ENHANCE, ENHANCE_ASYNC, ENHANCE_SYNCHRONOUS, PROPERTY_NAME

Constructor Summary

RestfulNlpAnalysisEngine()

Method Summary

protected void	activate(org.osgi.service.component.ComponentContext ce) Activate and read the properties.
int	canEnhance(org.apache.stanbol.enhancer.servicesapi.ContentItem ci) Indicate if this engine can enhance supplied ContentItem, and if it suggests enhancing it synchronously or asynchronously.
void	computeEnhancements(org.apache.stanbol.enhancer.servicesapi.ContentItem ci) Compute enhancements for supplied ContentItem.
protected void	deactivate(org.osgi.service.component.ComponentContext context)
Map<String,Object>	getServiceProperties()

Methods inherited from class org.apache.stanbol.enhancer.servicesapi.impl.AbstractEnhancementEngine

getName, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ANALYSIS_SERVICE_URL

public static final String ANALYSIS_SERVICE_URL

The URI for the remote analyses service

See Also:

Constant Field Values

ANALYSIS_SERVICE_USER

public static final String ANALYSIS_SERVICE_USER

The User for the remote analyses service

See Also:

Constant Field Values

ANALYSIS_SERVICE_PWD

public static final String ANALYSIS_SERVICE_PWD

The User for the remote analyses service

See Also:

Constant Field Values

CONFIG_LANGUAGES

public static final String CONFIG_LANGUAGES

Language configuration. Takes a list of ISO language codes to be processed by this engine. This list will be joined with the list of languages supported by the RESTful NLP analysis service.

See Also:

Constant Field Values

httpClient

protected org.apache.http.impl.client.DefaultHttpClient httpClient

Constructor Detail

RestfulNlpAnalysisEngine

public RestfulNlpAnalysisEngine()

Method Detail

canEnhance

public int canEnhance(org.apache.stanbol.enhancer.servicesapi.ContentItem ci)
               throws org.apache.stanbol.enhancer.servicesapi.EngineException

Indicate if this engine can enhance supplied ContentItem, and if it suggests enhancing it synchronously or asynchronously. The EnhancementJobManager can force sync/async mode if desired, it is just a suggestion from the engine.

Returns ENHANCE_ASYNC in case there is a text/plain content part and a tagger for the language identified for the content item, CANNOT_ENHANCE otherwise.

Specified by:

canEnhance in interface org.apache.stanbol.enhancer.servicesapi.EnhancementEngine

Throws:

org.apache.stanbol.enhancer.servicesapi.EngineException - if the introspecting process of the content item fails

computeEnhancements

public void computeEnhancements(org.apache.stanbol.enhancer.servicesapi.ContentItem ci)
                         throws org.apache.stanbol.enhancer.servicesapi.EngineException

Compute enhancements for supplied ContentItem. The results of the process are expected to be stored in the metadata of the content item.

The client (usually an EnhancementJobManager) should take care of persistent storage of the enhanced ContentItem.

This method creates a new POSContentPart using org.apache.stanbol.enhancer.engines.pos.api.POSTaggerHelper#createContentPart from a text/plain part and stores it as a new part in the content item. The metadata is not changed.

Specified by:

computeEnhancements in interface org.apache.stanbol.enhancer.servicesapi.EnhancementEngine

Throws:

org.apache.stanbol.enhancer.servicesapi.EngineException - if the underlying process failed to work as expected

getServiceProperties

public Map<String,Object> getServiceProperties()

Specified by:

getServiceProperties in interface org.apache.stanbol.enhancer.servicesapi.ServiceProperties

activate

@Activate
protected void activate(org.osgi.service.component.ComponentContext ce)
                 throws org.osgi.service.cm.ConfigurationException,
                        IOException

Activate and read the properties. Configures and initialises a POSTagger for each language configured in CONFIG_LANGUAGES.

Overrides:

activate in class org.apache.stanbol.enhancer.servicesapi.impl.AbstractEnhancementEngine<IOException,RuntimeException>

Parameters:

ce - the ComponentContext

Throws:

org.osgi.service.cm.ConfigurationException

IOException

deactivate

@Deactivate
protected void deactivate(org.osgi.service.component.ComponentContext context)

Overrides:

deactivate in class org.apache.stanbol.enhancer.servicesapi.impl.AbstractEnhancementEngine<IOException,RuntimeException>