co.cask.cdap.examples.wordcount

Class RetrieveCountsHandler

java.lang.Object

co.cask.cdap.internal.api.AbstractProgramDatasetConfigurable

co.cask.cdap.internal.api.AbstractPluginConfigurable<HttpServiceConfigurer>

co.cask.cdap.api.service.http.AbstractHttpServiceHandler

co.cask.cdap.examples.wordcount.RetrieveCountsHandler

All Implemented Interfaces:

HttpServiceHandler

public class RetrieveCountsHandler
extends AbstractHttpServiceHandler

Retrieve Counts service handler.

Constructor Summary

Constructors

Constructor and Description
RetrieveCountsHandler(WordCount.WordCountConfig config)

Method Summary

Methods

Modifier and Type	Method and Description
void	getAssoc(HttpServiceRequest request, HttpServiceResponder responder, String word1, String word2) Returns the count of associations for a specific word pair.
void	getCount(HttpServiceRequest request, HttpServiceResponder responder, String word, Integer limit) Returns the count for a specific word and its word associations, up to the specified limit or a pre-set limit of ten if not specified.
void	getCounts(HttpServiceRequest request, HttpServiceResponder responder) Returns the counts for all words in the input.
void	getMultiCounts(HttpServiceRequest request, HttpServiceResponder responder) Returns the counts for all words in the input.
void	getStats(HttpServiceRequest request, HttpServiceResponder responder) Returns total number of words, the number of unique words, and the average word length.
void	initialize(HttpServiceContext context)

Methods inherited from class co.cask.cdap.api.service.http.AbstractHttpServiceHandler

configure, configure, destroy, getConfigurer, getContext, setProperties, useDatasets, useDatasets

Methods inherited from class co.cask.cdap.internal.api.AbstractPluginConfigurable

usePlugin, usePlugin, usePluginClass, usePluginClass

Methods inherited from class co.cask.cdap.internal.api.AbstractProgramDatasetConfigurable

addDatasetModule, addDatasetType, addStream, addStream, createDataset, createDataset, createDataset, createDataset

Methods inherited from class java.lang.Object

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

Constructor Detail

RetrieveCountsHandler

public RetrieveCountsHandler(WordCount.WordCountConfig config)

Method Detail

initialize

public void initialize(HttpServiceContext context)
                throws Exception

Specified by:

initialize in interface HttpServiceHandler

Overrides:

initialize in class AbstractHttpServiceHandler

Throws:

Exception

getStats

@Path(value="stats")
@GET
public void getStats(HttpServiceRequest request,
                          HttpServiceResponder responder)

Returns total number of words, the number of unique words, and the average word length.

getCount

@Path(value="count/{word}")
@GET
public void getCount(HttpServiceRequest request,
                          HttpServiceResponder responder,
                          @PathParam(value="word")
                          String word,
                          @DefaultValue(value="10")@QueryParam(value="limit")
                          Integer limit)

Returns the count for a specific word and its word associations, up to the specified limit or a pre-set limit of ten if not specified.

getCounts

@Path(value="counts")
@POST
public void getCounts(HttpServiceRequest request,
                            HttpServiceResponder responder)

Returns the counts for all words in the input. The request body is expected to contain a comma-separated list of words.

getMultiCounts

@Path(value="multicounts")
@POST
public void getMultiCounts(HttpServiceRequest request,
                                 HttpServiceResponder responder)

Returns the counts for all words in the input. The request body is expected to contain a comma-separated list of words.

This endpoint method differs from getCounts(HttpServiceRequest,HttpServiceResponder) in using KeyValueTable.readAll(byte[][]) to perform a batched read.

getAssoc

@Path(value="assoc/{word1}/{word2}")
@GET
public void getAssoc(HttpServiceRequest request,
                          HttpServiceResponder responder,
                          @PathParam(value="word1")
                          String word1,
                          @PathParam(value="word2")
                          String word2)

Returns the count of associations for a specific word pair.