Java Code Examples for org.apache.flink.streaming.api.environment.CheckpointConfig#setCheckpointingMode()
The following examples show how to use
org.apache.flink.streaming.api.environment.CheckpointConfig#setCheckpointingMode() .
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Example 1
| Source File: HyperLogLogUvExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromLatest();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> {
// 反序列化 JSON
UserVisitWebEvent userVisitWebEvent = GsonUtil.fromJson(
string, UserVisitWebEvent.class);
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
return Tuple2.of(redisKey, userVisitWebEvent.getUserId());
})
.returns(new TypeHint<Tuple2<String, String>>(){})
.addSink(new RedisSink<>(conf, new RedisPfaddSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 2
| Source File: RedisSetUvExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> {
// 反序列化 JSON
UserVisitWebEvent userVisitWebEvent = GsonUtil.fromJson(
string, UserVisitWebEvent.class);
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
return Tuple2.of(redisKey, userVisitWebEvent.getUserId());
})
.returns(new TypeHint<Tuple2<String, String>>(){})
.addSink(new RedisSink<>(conf, new RedisSaddSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 3
| Source File: TuningKeyedStateDeduplication.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception{
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(10));
env.setParallelism(6);
RocksDBStateBackend rocksDBStateBackend = new RocksDBStateBackend("hdfs:///flink/checkpoints", enableIncrementalCheckpointing);
rocksDBStateBackend.setNumberOfTransferingThreads(numberOfTransferingThreads);
rocksDBStateBackend.setPredefinedOptions(PredefinedOptions.SPINNING_DISK_OPTIMIZED_HIGH_MEM);
rocksDBStateBackend.enableTtlCompactionFilter();
env.setStateBackend(rocksDBStateBackend);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.setMinPauseBetweenCheckpoints(TimeUnit.MINUTES.toMillis(8));
checkpointConf.setCheckpointTimeout(TimeUnit.MINUTES.toMillis(20));
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, DeduplicationExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "keyed-state-deduplication");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
DeduplicationExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromLatest();
env.addSource(kafkaConsumer)
.map(string -> GsonUtil.fromJson(string, UserVisitWebEvent.class)) // 反序列化 JSON
// 这里将日志的主键 id 通过 murmur3_128 hash 后，将生成 long 类型数据当做 key
.keyBy((KeySelector<UserVisitWebEvent, Long>) log ->
Hashing.murmur3_128(5).hashUnencodedChars(log.getId()).asLong())
.addSink(new KeyedStateDeduplication.KeyedStateSink());
env.execute("TuningKeyedStateDeduplication");
}
Example 4
| Source File: KeyedStateDeduplication.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception{
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.setParallelism(6);
// 使用 RocksDBStateBackend 做为状态后端，并开启增量 Checkpoint
RocksDBStateBackend rocksDBStateBackend = new RocksDBStateBackend(
"hdfs:///flink/checkpoints", true);
rocksDBStateBackend.setNumberOfTransferingThreads(3);
// 设置为机械硬盘+内存模式，强烈建议为 RocksDB 配备 SSD
rocksDBStateBackend.setPredefinedOptions(
PredefinedOptions.SPINNING_DISK_OPTIMIZED_HIGH_MEM);
rocksDBStateBackend.enableTtlCompactionFilter();
env.setStateBackend(rocksDBStateBackend);
// Checkpoint 间隔为 10 分钟
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(10));
// 配置 Checkpoint
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.setMinPauseBetweenCheckpoints(TimeUnit.MINUTES.toMillis(8));
checkpointConf.setCheckpointTimeout(TimeUnit.MINUTES.toMillis(20));
checkpointConf.enableExternalizedCheckpoints(
CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
// Kafka Consumer 配置
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, DeduplicationExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "keyed-state-deduplication");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
DeduplicationExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
env.addSource(kafkaConsumer)
.map(log -> GsonUtil.fromJson(log, UserVisitWebEvent.class)) // 反序列化 JSON
.keyBy((KeySelector<UserVisitWebEvent, String>) UserVisitWebEvent::getId)
.addSink(new KeyedStateSink());
env.execute("KeyedStateDeduplication");
}
Example 5
| Source File: UnionListStateExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// 1 分钟一次CheckPoint
env.enableCheckpointing(TimeUnit.SECONDS.toMillis(15));
env.setParallelism(3);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
// CheckPoint 语义 EXACTLY ONCE
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UnionListStateUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-pv-stat");
FlinkKafkaConsumer011<String> kafkaConsumer011 = new FlinkKafkaConsumer011<>(
// kafka topic， String 序列化
UnionListStateUtil.topic, new SimpleStringSchema(), props);
env.addSource(kafkaConsumer011)
.uid(UnionListStateUtil.topic)
.addSink(new MySink())
.uid("MySink")
.name("MySink");
env.execute("Flink unionListState");
}
Example 6
| Source File: HyperLogLogUvExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromLatest();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> {
// 反序列化 JSON
UserVisitWebEvent userVisitWebEvent = GsonUtil.fromJson(
string, UserVisitWebEvent.class);
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
return Tuple2.of(redisKey, userVisitWebEvent.getUserId());
})
.returns(new TypeHint<Tuple2<String, String>>(){})
.addSink(new RedisSink<>(conf, new RedisPfaddSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 7
| Source File: MapStateUvExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> GsonUtil.fromJson(string, UserVisitWebEvent.class)) // 反序列化 JSON
.keyBy("date","pageId") // 按照 日期和页面 进行 keyBy
.map(new RichMapFunction<UserVisitWebEvent, Tuple2<String, Long>>() {
// 存储当前 key 对应的 userId 集合
private MapState<String,Boolean> userIdState;
// 存储当前 key 对应的 UV 值
private ValueState<Long> uvState;
@Override
public Tuple2<String, Long> map(UserVisitWebEvent userVisitWebEvent) throws Exception {
// 初始化 uvState
if(null == uvState.value()){
uvState.update(0L);
}
// userIdState 中不包含当前访问的 userId，说明该用户今天还未访问过该页面
// 则将该 userId put 到 userIdState 中，并把 UV 值 +1
if(!userIdState.contains(userVisitWebEvent.getUserId())){
userIdState.put(userVisitWebEvent.getUserId(),null);
uvState.update(uvState.value() + 1);
}
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
System.out.println(redisKey + " ::: " + uvState.value());
return Tuple2.of(redisKey, uvState.value());
}
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
// 从状态中恢复 userIdState
userIdState = getRuntimeContext().getMapState(
new MapStateDescriptor<>("userIdState",
TypeInformation.of(new TypeHint<String>() {}),
TypeInformation.of(new TypeHint<Boolean>() {})));
// 从状态中恢复 uvState
uvState = getRuntimeContext().getState(
new ValueStateDescriptor<>("uvState",
TypeInformation.of(new TypeHint<Long>() {})));
}
})
.addSink(new RedisSink<>(conf, new RedisSetSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 8
| Source File: RedisSetUvExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> {
// 反序列化 JSON
UserVisitWebEvent userVisitWebEvent = GsonUtil.fromJson(
string, UserVisitWebEvent.class);
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
return Tuple2.of(redisKey, userVisitWebEvent.getUserId());
})
.returns(new TypeHint<Tuple2<String, String>>(){})
.addSink(new RedisSink<>(conf, new RedisSaddSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 9
| Source File: TuningKeyedStateDeduplication.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception{
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(10));
env.setParallelism(6);
RocksDBStateBackend rocksDBStateBackend = new RocksDBStateBackend("hdfs:///flink/checkpoints", enableIncrementalCheckpointing);
rocksDBStateBackend.setNumberOfTransferingThreads(numberOfTransferingThreads);
rocksDBStateBackend.setPredefinedOptions(PredefinedOptions.SPINNING_DISK_OPTIMIZED_HIGH_MEM);
rocksDBStateBackend.enableTtlCompactionFilter();
env.setStateBackend(rocksDBStateBackend);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.setMinPauseBetweenCheckpoints(TimeUnit.MINUTES.toMillis(8));
checkpointConf.setCheckpointTimeout(TimeUnit.MINUTES.toMillis(20));
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, DeduplicationExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "keyed-state-deduplication");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
DeduplicationExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromLatest();
env.addSource(kafkaConsumer)
.map(string -> GsonUtil.fromJson(string, UserVisitWebEvent.class)) // 反序列化 JSON
// 这里将日志的主键 id 通过 murmur3_128 hash 后，将生成 long 类型数据当做 key
.keyBy((KeySelector<UserVisitWebEvent, Long>) log ->
Hashing.murmur3_128(5).hashUnencodedChars(log.getId()).asLong())
.addSink(new KeyedStateDeduplication.KeyedStateSink());
env.execute("TuningKeyedStateDeduplication");
}
Example 10
| Source File: KeyedStateDeduplication.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception{
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.setParallelism(6);
// 使用 RocksDBStateBackend 做为状态后端，并开启增量 Checkpoint
RocksDBStateBackend rocksDBStateBackend = new RocksDBStateBackend(
"hdfs:///flink/checkpoints", true);
rocksDBStateBackend.setNumberOfTransferingThreads(3);
// 设置为机械硬盘+内存模式，强烈建议为 RocksDB 配备 SSD
rocksDBStateBackend.setPredefinedOptions(
PredefinedOptions.SPINNING_DISK_OPTIMIZED_HIGH_MEM);
rocksDBStateBackend.enableTtlCompactionFilter();
env.setStateBackend(rocksDBStateBackend);
// Checkpoint 间隔为 10 分钟
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(10));
// 配置 Checkpoint
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.setMinPauseBetweenCheckpoints(TimeUnit.MINUTES.toMillis(8));
checkpointConf.setCheckpointTimeout(TimeUnit.MINUTES.toMillis(20));
checkpointConf.enableExternalizedCheckpoints(
CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
// Kafka Consumer 配置
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, DeduplicationExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "keyed-state-deduplication");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
DeduplicationExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
env.addSource(kafkaConsumer)
.map(log -> GsonUtil.fromJson(log, UserVisitWebEvent.class)) // 反序列化 JSON
.keyBy((KeySelector<UserVisitWebEvent, String>) UserVisitWebEvent::getId)
.addSink(new KeyedStateSink());
env.execute("KeyedStateDeduplication");
}
Example 11
| Source File: UnionListStateExample.java From flink-learning with Apache License 2.0 | 5 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// 1 分钟一次CheckPoint
env.enableCheckpointing(TimeUnit.SECONDS.toMillis(15));
env.setParallelism(3);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
// CheckPoint 语义 EXACTLY ONCE
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UnionListStateUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-pv-stat");
FlinkKafkaConsumer011<String> kafkaConsumer011 = new FlinkKafkaConsumer011<>(
// kafka topic， String 序列化
UnionListStateUtil.topic, new SimpleStringSchema(), props);
env.addSource(kafkaConsumer011)
.uid(UnionListStateUtil.topic)
.addSink(new MySink())
.uid("MySink")
.name("MySink");
env.execute("Flink unionListState");
}
Example 12
| Source File: PvStatLocalKeyByExactlyOnce.java From flink-learning with Apache License 2.0 | 4 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// 1 分钟一次 Checkpoint
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
// Checkpoint 语义 EXACTLY ONCE
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, PvStatExactlyOnceKafkaUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-pv-stat");
FlinkKafkaConsumerBase<String> appKafkaConsumer = new FlinkKafkaConsumer011<>(
// kafka topic， String 序列化
PvStatExactlyOnceKafkaUtil.topic, new SimpleStringSchema(), props).setStartFromLatest();
env.addSource(appKafkaConsumer)
.flatMap(new LocalKeyByFlatMap(10))
// 按照 appId 进行 keyBy
.keyBy((KeySelector<Tuple2<String, Long>, String>) appIdPv -> appIdPv.f0)
.map(new RichMapFunction<Tuple2<String, Long>, Tuple2<String, Long>>() {
private ValueState<Long> pvState;
private long pv = 0;
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
// 初始化状态
pvState = getRuntimeContext().getState(
new ValueStateDescriptor<>("pvStat",
TypeInformation.of(new TypeHint<Long>() {
})));
}
@Override
public Tuple2<String, Long> map(Tuple2<String, Long> tuple2) throws Exception {
// 从状态中获取该 app 的pv值，加上新收到的 pv 值以后后，update 到状态中
if (null == pvState.value()) {
log.info("{} is new, PV is {}", tuple2.f0, tuple2.f1);
pv = tuple2.f1;
} else {
pv = pvState.value();
pv += tuple2.f1;
log.info("{} is old, PV is {}", tuple2.f0, pv);
}
pvState.update(pv);
tuple2.setField(pv, 1);
return tuple2;
}
})
.print();
env.execute("Flink pv stat LocalKeyBy");
}
Example 13
| Source File: MapStateUvExample.java From flink-learning with Apache License 2.0 | 4 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, UvExampleUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-uv-stat");
FlinkKafkaConsumerBase<String> kafkaConsumer = new FlinkKafkaConsumer011<>(
UvExampleUtil.topic, new SimpleStringSchema(), props)
.setStartFromGroupOffsets();
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig
.Builder().setHost("192.168.30.244").build();
env.addSource(kafkaConsumer)
.map(string -> GsonUtil.fromJson(string, UserVisitWebEvent.class)) // 反序列化 JSON
.keyBy("date","pageId") // 按照 日期和页面 进行 keyBy
.map(new RichMapFunction<UserVisitWebEvent, Tuple2<String, Long>>() {
// 存储当前 key 对应的 userId 集合
private MapState<String,Boolean> userIdState;
// 存储当前 key 对应的 UV 值
private ValueState<Long> uvState;
@Override
public Tuple2<String, Long> map(UserVisitWebEvent userVisitWebEvent) throws Exception {
// 初始化 uvState
if(null == uvState.value()){
uvState.update(0L);
}
// userIdState 中不包含当前访问的 userId，说明该用户今天还未访问过该页面
// 则将该 userId put 到 userIdState 中，并把 UV 值 +1
if(!userIdState.contains(userVisitWebEvent.getUserId())){
userIdState.put(userVisitWebEvent.getUserId(),null);
uvState.update(uvState.value() + 1);
}
// 生成 Redis key，格式为 日期_pageId，如: 20191026_0
String redisKey = userVisitWebEvent.getDate() + "_"
+ userVisitWebEvent.getPageId();
System.out.println(redisKey + " ::: " + uvState.value());
return Tuple2.of(redisKey, uvState.value());
}
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
// 从状态中恢复 userIdState
userIdState = getRuntimeContext().getMapState(
new MapStateDescriptor<>("userIdState",
TypeInformation.of(new TypeHint<String>() {}),
TypeInformation.of(new TypeHint<Boolean>() {})));
// 从状态中恢复 uvState
uvState = getRuntimeContext().getState(
new ValueStateDescriptor<>("uvState",
TypeInformation.of(new TypeHint<Long>() {})));
}
})
.addSink(new RedisSink<>(conf, new RedisSetSinkMapper()));
env.execute("Redis Set UV Stat");
}
Example 14
| Source File: PvStatLocalKeyByExactlyOnce.java From flink-learning with Apache License 2.0 | 4 votes |
|
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// 1 分钟一次 Checkpoint
env.enableCheckpointing(TimeUnit.MINUTES.toMillis(1));
env.setParallelism(2);
CheckpointConfig checkpointConf = env.getCheckpointConfig();
// Checkpoint 语义 EXACTLY ONCE
checkpointConf.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
checkpointConf.enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, PvStatExactlyOnceKafkaUtil.broker_list);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "app-pv-stat");
FlinkKafkaConsumerBase<String> appKafkaConsumer = new FlinkKafkaConsumer011<>(
// kafka topic， String 序列化
PvStatExactlyOnceKafkaUtil.topic, new SimpleStringSchema(), props).setStartFromLatest();
env.addSource(appKafkaConsumer)
.flatMap(new LocalKeyByFlatMap(10))
// 按照 appId 进行 keyBy
.keyBy((KeySelector<Tuple2<String, Long>, String>) appIdPv -> appIdPv.f0)
.map(new RichMapFunction<Tuple2<String, Long>, Tuple2<String, Long>>() {
private ValueState<Long> pvState;
private long pv = 0;
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
// 初始化状态
pvState = getRuntimeContext().getState(
new ValueStateDescriptor<>("pvStat",
TypeInformation.of(new TypeHint<Long>() {
})));
}
@Override
public Tuple2<String, Long> map(Tuple2<String, Long> tuple2) throws Exception {
// 从状态中获取该 app 的pv值，加上新收到的 pv 值以后后，update 到状态中
if (null == pvState.value()) {
log.info("{} is new, PV is {}", tuple2.f0, tuple2.f1);
pv = tuple2.f1;
} else {
pv = pvState.value();
pv += tuple2.f1;
log.info("{} is old, PV is {}", tuple2.f0, pv);
}
pvState.update(pv);
tuple2.setField(pv, 1);
return tuple2;
}
})
.print();
env.execute("Flink pv stat LocalKeyBy");
}
