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feat: caches watermark for Spanner change streams
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49 changes: 49 additions & 0 deletions
49
...rm/src/main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/cache/CacheFactory.java
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|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.beam.sdk.io.gcp.spanner.changestreams.cache; | ||
|
|
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| import java.io.Serializable; | ||
| import javax.annotation.Nullable; | ||
| import org.apache.beam.sdk.io.gcp.spanner.changestreams.dao.DaoFactory; | ||
| import org.joda.time.Duration; | ||
|
|
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| @SuppressWarnings({"initialization.fields.uninitialized", "nullness"}) | ||
| public class CacheFactory implements Serializable { | ||
|
|
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| private static final long serialVersionUID = -8722905670370252723L; | ||
| private final DaoFactory daoFactory; | ||
| private final @Nullable Duration refreshRate; | ||
| private transient WatermarkCache watermarkCacheInstance; | ||
|
|
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| public CacheFactory(DaoFactory daoFactory, @Nullable Duration watermarkRefreshRate) { | ||
| this.daoFactory = daoFactory; | ||
| this.refreshRate = watermarkRefreshRate; | ||
| } | ||
|
|
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| public synchronized WatermarkCache getWatermarkCache() { | ||
| if (watermarkCacheInstance == null) { | ||
| if (refreshRate == null) { | ||
| watermarkCacheInstance = new NoOpWatermarkCache(daoFactory.getPartitionMetadataDao()); | ||
| } else { | ||
| watermarkCacheInstance = | ||
| new LoadingWatermarkCache(daoFactory.getPartitionMetadataDao(), refreshRate); | ||
| } | ||
| } | ||
| return watermarkCacheInstance; | ||
| } | ||
| } |
56 changes: 56 additions & 0 deletions
56
...in/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/cache/LoadingWatermarkCache.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.beam.sdk.io.gcp.spanner.changestreams.cache; | ||
|
|
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| import com.google.cloud.Timestamp; | ||
| import java.time.Duration; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.ExecutionException; | ||
| import javax.annotation.Nullable; | ||
| import org.apache.beam.sdk.io.gcp.spanner.changestreams.dao.PartitionMetadataDao; | ||
| import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.cache.CacheBuilder; | ||
| import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.cache.CacheLoader; | ||
| import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.cache.LoadingCache; | ||
|
|
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| public class LoadingWatermarkCache implements WatermarkCache { | ||
| private static final Object MIN_WATERMARK_KEY = new Object(); | ||
|
|
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| private final LoadingCache<Object, Optional<Timestamp>> cache; | ||
|
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| public LoadingWatermarkCache(PartitionMetadataDao dao, org.joda.time.Duration refreshRate) { | ||
| this.cache = | ||
| CacheBuilder.newBuilder() | ||
| .refreshAfterWrite(Duration.ofMillis(refreshRate.getMillis())) | ||
| .build( | ||
| new CacheLoader<Object, Optional<Timestamp>>() { | ||
| @Override | ||
| public Optional<Timestamp> load(Object key) { | ||
| return Optional.ofNullable(dao.getUnfinishedMinWatermark()); | ||
| } | ||
| }); | ||
| } | ||
|
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| @Override | ||
| public @Nullable Timestamp getUnfinishedMinWatermark() { | ||
| try { | ||
| return cache.get(MIN_WATERMARK_KEY).orElse(null); | ||
| } catch (ExecutionException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
36 changes: 36 additions & 0 deletions
36
.../main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/cache/NoOpWatermarkCache.java
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|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.beam.sdk.io.gcp.spanner.changestreams.cache; | ||
|
|
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| import com.google.cloud.Timestamp; | ||
| import javax.annotation.Nullable; | ||
| import org.apache.beam.sdk.io.gcp.spanner.changestreams.dao.PartitionMetadataDao; | ||
|
|
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| public class NoOpWatermarkCache implements WatermarkCache { | ||
|
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| private final PartitionMetadataDao dao; | ||
|
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| public NoOpWatermarkCache(PartitionMetadataDao dao) { | ||
| this.dao = dao; | ||
| } | ||
|
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| @Override | ||
| public @Nullable Timestamp getUnfinishedMinWatermark() { | ||
| return dao.getUnfinishedMinWatermark(); | ||
| } | ||
| } |
26 changes: 26 additions & 0 deletions
26
.../src/main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/cache/WatermarkCache.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.beam.sdk.io.gcp.spanner.changestreams.cache; | ||
|
|
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| import com.google.cloud.Timestamp; | ||
| import javax.annotation.Nullable; | ||
|
|
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| public interface WatermarkCache { | ||
| @Nullable | ||
| Timestamp getUnfinishedMinWatermark(); | ||
| } |
20 changes: 20 additions & 0 deletions
20
...rm/src/main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/cache/package-info.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| /** Caching strategy for watermark. */ | ||
| package org.apache.beam.sdk.io.gcp.spanner.changestreams.cache; |
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