org.apache.flink.api.java

类 CollectionEnvironment

java.lang.Object

org.apache.flink.api.java.ExecutionEnvironment

org.apache.flink.api.java.CollectionEnvironment

@PublicEvolving
public class CollectionEnvironment
extends ExecutionEnvironment

Version of ExecutionEnvironment that allows serial, local, collection-based executions of Flink programs.

字段概要

从类继承的字段 org.apache.flink.api.java.ExecutionEnvironment

jobID, lastJobExecutionResult, LOG, sessionTimeout

构造器概要

构造器

构造器和说明
CollectionEnvironment()

方法概要

限定符和类型	方法和说明
org.apache.flink.api.common.JobExecutionResult	execute(String jobName) Triggers the program execution.
String	getExecutionPlan() Creates the plan with which the system will execute the program, and returns it as a String using a JSON representation of the execution data flow graph.
int	getParallelism() Gets the parallelism with which operation are executed by default.
void	startNewSession() Starts a new session, discarding the previous data flow and all of its intermediate results.

从类继承的方法 org.apache.flink.api.java.ExecutionEnvironment

addDefaultKryoSerializer, addDefaultKryoSerializer, areExplicitEnvironmentsAllowed, createCollectionsEnvironment, createInput, createInput, createLocalEnvironment, createLocalEnvironment, createLocalEnvironment, createLocalEnvironmentWithWebUI, createProgramPlan, createProgramPlan, createProgramPlan, createRemoteEnvironment, createRemoteEnvironment, createRemoteEnvironment, execute, fromCollection, fromCollection, fromCollection, fromCollection, fromElements, fromElements, fromParallelCollection, fromParallelCollection, generateSequence, getConfig, getDefaultLocalParallelism, getExecutionEnvironment, getId, getIdString, getLastJobExecutionResult, getNumberOfExecutionRetries, getRestartStrategy, getSessionTimeout, initializeContextEnvironment, readCsvFile, readFile, readFileOfPrimitives, readFileOfPrimitives, readTextFile, readTextFile, readTextFileWithValue, readTextFileWithValue, registerCachedFile, registerCachedFile, registerCachedFilesWithPlan, registerType, registerTypeWithKryoSerializer, registerTypeWithKryoSerializer, resetContextEnvironment, setDefaultLocalParallelism, setNumberOfExecutionRetries, setParallelism, setRestartStrategy, setSessionTimeout

从类继承的方法 java.lang.Object

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

构造器详细资料

CollectionEnvironment

public CollectionEnvironment()

方法详细资料

execute

public org.apache.flink.api.common.JobExecutionResult execute(String jobName)
                                                       throws Exception

从类复制的说明: ExecutionEnvironment

Triggers the program execution. The environment will execute all parts of the program that have resulted in a "sink" operation. Sink operations are for example printing results (DataSet.print(), writing results (e.g. DataSet.writeAsText(String), DataSet.write(org.apache.flink.api.common.io.FileOutputFormat, String), or other generic data sinks created with DataSet.output(org.apache.flink.api.common.io.OutputFormat).

The program execution will be logged and displayed with the given job name.

指定者:

execute 在类中 ExecutionEnvironment

返回:

The result of the job execution, containing elapsed time and accumulators.

抛出:

Exception - Thrown, if the program executions fails.

getParallelism

public int getParallelism()

从类复制的说明: ExecutionEnvironment

Gets the parallelism with which operation are executed by default. Operations can individually override this value to use a specific parallelism via Operator.setParallelism(int). Other operations may need to run with a different parallelism - for example calling DataSet.reduce(org.apache.flink.api.common.functions.ReduceFunction) over the entire set will insert eventually an operation that runs non-parallel (parallelism of one).

覆盖:

getParallelism 在类中 ExecutionEnvironment

返回:

The parallelism used by operations, unless they override that value. This method returns ExecutionConfig.PARALLELISM_DEFAULT, if the environment's default parallelism should be used.

getExecutionPlan

public String getExecutionPlan()
                        throws Exception

从类复制的说明: ExecutionEnvironment

Creates the plan with which the system will execute the program, and returns it as a String using a JSON representation of the execution data flow graph. Note that this needs to be called, before the plan is executed.

指定者:

getExecutionPlan 在类中 ExecutionEnvironment

返回:

The execution plan of the program, as a JSON String.

抛出:

Exception - Thrown, if the compiler could not be instantiated, or the master could not be contacted to retrieve information relevant to the execution planning.

startNewSession

public void startNewSession()
                     throws Exception

从类复制的说明: ExecutionEnvironment

Starts a new session, discarding the previous data flow and all of its intermediate results.

指定者:

startNewSession 在类中 ExecutionEnvironment

抛出:

Exception