[
https://issues.apache.org/jira/browse/FLINK-10577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
zhanghao updated FLINK-10577:
-----------------------------
Description:
I think greedy operator has some problem.
Given the below java code:
{code:java}
StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
DataStream<Tuple3<Integer, Long, String>> input = env.fromElements(
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:00").getTime(),
"r"),
Tuple3.of(new Integer(101), Timestamp.valueOf("2018-10-01 13:00:00").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:01").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:03").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:04").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:05").getTime(),
"c"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:08").getTime(),
"c"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:11").getTime(),
"a")
).assignTimestampsAndWatermarks(new
BoundedOutOfOrdernessTimestampExtractor<Tuple3<Integer, Long,
String>>(Time.seconds(2)) {
private static final long serialVersionUID = 1L;
@Override
public long extractTimestamp(Tuple3<Integer, Long, String> element) {
return element.f1;
}
});
AfterMatchSkipStrategy strategy = AfterMatchSkipStrategy.skipPastLastEvent();
Pattern<Tuple3<Integer, Long, String>, ?> pattern = Pattern.<Tuple3<Integer,
Long, String>>begin("start", strategy)
.where(new SimpleCondition<Tuple3<Integer, Long, String>>() {
private static final long serialVersionUID = 1L;
@Override
public boolean filter(Tuple3<Integer, Long, String> e) {
return e.f2.equals("r") ? true : false;
}
}).followedBy("middle").where(new SimpleCondition<Tuple3<Integer, Long,
String>>() {
private static final long serialVersionUID = 1L;
@Override
public boolean filter(Tuple3<Integer, Long, String> e) throws Exception {
return !e.f2.equals("r") ? true : false;
}
}).oneOrMore().greedy()
.within(Time.seconds(10));
CEP.pattern(input.keyBy(0), pattern)
.select(new PatternSelectFunction<Tuple3<Integer, Long, String>, String>() {
private static final long serialVersionUID = 1L;
@Override
public String select(Map<String, List<Tuple3<Integer, Long, String>>> pattern) {
StringBuilder builder = new StringBuilder();
List<Tuple3<Integer, Long, String>> start = pattern.get("start");
List<Tuple3<Integer, Long, String>> middle = pattern.get("middle");
for (Tuple3<Integer, Long, String> t : start) {
builder.append(t.f0).append(",");
}
for (Tuple3<Integer, Long, String> t : middle) {
builder.append(t.f0).append(",");
}
return builder.toString();
}
})
.print();
env.execute();{code}
I would like to see:100,100,100,100,100,100
however it matches 100,100
I have tried to use AfterMatchSkipStrategy.skipPastLastEvent() for skipping
some partial matches,it also matches 100,100.
Is there something important about greedy operator that i misunderstand?
was:
I think greedy operator has some problem.
Given the below java code:
{code:java}
StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
DataStream<Tuple3<Integer, Long, String>> input = env.fromElements(
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:00").getTime(),
"r"),
Tuple3.of(new Integer(101), Timestamp.valueOf("2018-10-01 13:00:00").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:01").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:03").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:04").getTime(),
"p"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:05").getTime(),
"c"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:08").getTime(),
"c"),
Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01 13:00:11").getTime(),
"a")
).assignTimestampsAndWatermarks(new
BoundedOutOfOrdernessTimestampExtractor<Tuple3<Integer, Long,
String>>(Time.seconds(2)) {
private static final long serialVersionUID = 1L;
@Override
public long extractTimestamp(Tuple3<Integer, Long, String> element) {
return element.f1;
}
});
AfterMatchSkipStrategy strategy = AfterMatchSkipStrategy.skipPastLastEvent();
Pattern<Tuple3<Integer, Long, String>, ?> pattern = Pattern.<Tuple3<Integer,
Long, String>>begin("start", strategy)
.where(new SimpleCondition<Tuple3<Integer, Long, String>>() {
private static final long serialVersionUID = 1L;
@Override
public boolean filter(Tuple3<Integer, Long, String> e) {
return e.f2.equals("r") ? true : false;
}
}).followedBy("middle").where(new SimpleCondition<Tuple3<Integer, Long,
String>>() {
private static final long serialVersionUID = 1L;
@Override
public boolean filter(Tuple3<Integer, Long, String> e) throws Exception {
return !e.f2.equals("r") ? true : false;
}
}).oneOrMore().greedy()
.within(Time.seconds(10));
CEP.pattern(input.keyBy(0), pattern)
.select(new PatternSelectFunction<Tuple3<Integer, Long, String>, String>() {
private static final long serialVersionUID = 1L;
@Override
public String select(Map<String, List<Tuple3<Integer, Long, String>>> pattern) {
StringBuilder builder = new StringBuilder();
List<Tuple3<Integer, Long, String>> start = pattern.get("start");
List<Tuple3<Integer, Long, String>> middle = pattern.get("middle");
for (Tuple3<Integer, Long, String> t : start) {
builder.append(t.f0).append(",");
}
for (Tuple3<Integer, Long, String> t : middle) {
builder.append(t.f0).append(",");
}
return builder.toString();
}
})
.print();
env.execute();{code}
I would like to see:100,100,100,100,100,100
however it matches 100,100
I have tried to use AfterMatchSkipStrategy.skipPastLastEvent() for skipping
some partial matches,it also matches 100,100.
Is there something important about greedy operator that i misunderstood?
> CEP's greedy() doesn't work
> ---------------------------
>
> Key: FLINK-10577
> URL: https://issues.apache.org/jira/browse/FLINK-10577
> Project: Flink
> Issue Type: Bug
> Components: CEP
> Affects Versions: 1.6.0
> Reporter: zhanghao
> Priority: Major
>
> I think greedy operator has some problem.
> Given the below java code:
>
> {code:java}
> StreamExecutionEnvironment env =
> StreamExecutionEnvironment.getExecutionEnvironment();
> env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
> DataStream<Tuple3<Integer, Long, String>> input = env.fromElements(
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:00").getTime(), "r"),
> Tuple3.of(new Integer(101), Timestamp.valueOf("2018-10-01
> 13:00:00").getTime(), "p"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:01").getTime(), "p"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:03").getTime(), "p"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:04").getTime(), "p"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:05").getTime(), "c"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:08").getTime(), "c"),
> Tuple3.of(new Integer(100), Timestamp.valueOf("2018-10-01
> 13:00:11").getTime(), "a")
> ).assignTimestampsAndWatermarks(new
> BoundedOutOfOrdernessTimestampExtractor<Tuple3<Integer, Long,
> String>>(Time.seconds(2)) {
> private static final long serialVersionUID = 1L;
> @Override
> public long extractTimestamp(Tuple3<Integer, Long, String> element) {
> return element.f1;
> }
> });
> AfterMatchSkipStrategy strategy = AfterMatchSkipStrategy.skipPastLastEvent();
> Pattern<Tuple3<Integer, Long, String>, ?> pattern = Pattern.<Tuple3<Integer,
> Long, String>>begin("start", strategy)
> .where(new SimpleCondition<Tuple3<Integer, Long, String>>() {
> private static final long serialVersionUID = 1L;
> @Override
> public boolean filter(Tuple3<Integer, Long, String> e) {
> return e.f2.equals("r") ? true : false;
> }
> }).followedBy("middle").where(new SimpleCondition<Tuple3<Integer, Long,
> String>>() {
> private static final long serialVersionUID = 1L;
> @Override
> public boolean filter(Tuple3<Integer, Long, String> e) throws Exception {
> return !e.f2.equals("r") ? true : false;
> }
> }).oneOrMore().greedy()
> .within(Time.seconds(10));
> CEP.pattern(input.keyBy(0), pattern)
> .select(new PatternSelectFunction<Tuple3<Integer, Long, String>, String>() {
> private static final long serialVersionUID = 1L;
> @Override
> public String select(Map<String, List<Tuple3<Integer, Long, String>>>
> pattern) {
> StringBuilder builder = new StringBuilder();
> List<Tuple3<Integer, Long, String>> start = pattern.get("start");
> List<Tuple3<Integer, Long, String>> middle = pattern.get("middle");
> for (Tuple3<Integer, Long, String> t : start) {
> builder.append(t.f0).append(",");
> }
> for (Tuple3<Integer, Long, String> t : middle) {
> builder.append(t.f0).append(",");
> }
> return builder.toString();
> }
> })
> .print();
> env.execute();{code}
> I would like to see:100,100,100,100,100,100
> however it matches 100,100
> I have tried to use AfterMatchSkipStrategy.skipPastLastEvent() for skipping
> some partial matches,it also matches 100,100.
> Is there something important about greedy operator that i misunderstand?
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