Package org.apache.flink.cep.functions.adaptors

Class PatternFlatSelectAdapter<IN,OUT>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.cep.functions.PatternProcessFunction<IN,OUT>

org.apache.flink.cep.functions.adaptors.PatternFlatSelectAdapter<IN,OUT>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

Direct Known Subclasses:

PatternTimeoutFlatSelectAdapter

@Internal
public class PatternFlatSelectAdapter<IN,OUT>
extends PatternProcessFunction<IN,OUT>

Adapter that expresses PatternFlatSelectFunction with PatternProcessFunction.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.cep.functions.PatternProcessFunction

PatternProcessFunction.Context

Constructor Summary

Constructors

Constructor	Description
PatternFlatSelectAdapter(PatternFlatSelectFunction<IN,OUT> flatSelectFunction)

Method Summary

Modifier and Type	Method	Description
void	close()
void	open(org.apache.flink.api.common.functions.OpenContext openContext)
void	processMatch(Map<String,List<IN>> match, PatternProcessFunction.Context ctx, org.apache.flink.util.Collector<OUT> out)	Generates resulting elements given a map of detected pattern events.

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext, getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Details

PatternFlatSelectAdapter

public PatternFlatSelectAdapter(PatternFlatSelectFunction<IN,OUT> flatSelectFunction)

Method Details

open

public void open(org.apache.flink.api.common.functions.OpenContext openContext)
          throws Exception

Specified by:

open in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

open in class org.apache.flink.api.common.functions.AbstractRichFunction

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

close in class org.apache.flink.api.common.functions.AbstractRichFunction

Throws:

Exception

processMatch

public void processMatch(Map<String,List<IN>> match,
 PatternProcessFunction.Context ctx,
 org.apache.flink.util.Collector<OUT> out)
                  throws Exception

Description copied from class: PatternProcessFunction

Generates resulting elements given a map of detected pattern events. The events are identified by their specified names.

TimeContext.timestamp() in this case returns the time of the last element that was assigned to the match, resulting in this partial match being finished.

Specified by:

processMatch in class PatternProcessFunction<IN,OUT>

Parameters:

match - map containing the found pattern. Events are identified by their names.

ctx - enables access to time features and emitting results through side outputs

out - Collector used to output the generated elements

Throws:

Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.