| /* |
| * 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.pulsar.functions.instance.state; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Optional; |
| import java.util.concurrent.CompletableFuture; |
| import org.apache.pulsar.functions.api.StateStoreContext; |
| import org.apache.pulsar.functions.api.state.StateValue; |
| import org.apache.pulsar.metadata.api.MetadataCache; |
| import org.apache.pulsar.metadata.api.MetadataStore; |
| |
| public class PulsarMetadataStateStoreImpl implements DefaultStateStore { |
| |
| private final MetadataStore store; |
| private final String prefixPath; |
| private final MetadataCache<Long> countersCache; |
| |
| private final String namespace; |
| private final String tenant; |
| private final String name; |
| private final String fqsn; |
| |
| PulsarMetadataStateStoreImpl(MetadataStore store, String prefix, String tenant, String namespace, String name) { |
| this.store = store; |
| this.tenant = tenant; |
| this.namespace = namespace; |
| this.name = name; |
| this.fqsn = tenant + '/' + namespace + '/' + name; |
| |
| this.prefixPath = prefix + '/' + fqsn + '/'; |
| this.countersCache = store.getMetadataCache(Long.class); |
| } |
| |
| @Override |
| public String tenant() { |
| return tenant; |
| } |
| |
| @Override |
| public String namespace() { |
| return namespace; |
| } |
| |
| @Override |
| public String name() { |
| return name; |
| } |
| |
| @Override |
| public String fqsn() { |
| return fqsn; |
| } |
| |
| @Override |
| public void init(StateStoreContext ctx) { |
| } |
| |
| @Override |
| public void close() { |
| } |
| |
| @Override |
| public void put(String key, ByteBuffer value) { |
| putAsync(key, value).join(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> putAsync(String key, ByteBuffer value) { |
| byte[] bytes = new byte[value.remaining()]; |
| value.get(bytes); |
| return store.put(getPath(key), bytes, Optional.empty()) |
| .thenApply(__ -> null); |
| } |
| |
| @Override |
| public void delete(String key) { |
| deleteAsync(key).join(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> deleteAsync(String key) { |
| return store.delete(getPath(key), Optional.empty()); |
| } |
| |
| @Override |
| public ByteBuffer get(String key) { |
| return getAsync(key).join(); |
| } |
| |
| @Override |
| public CompletableFuture<ByteBuffer> getAsync(String key) { |
| return store.get(getPath(key)) |
| .thenApply(optRes -> |
| optRes.map(x -> ByteBuffer.wrap(x.getValue())) |
| .orElse(null)); |
| } |
| |
| @Override |
| public StateValue getStateValue(String key) { |
| return getStateValueAsync(key).join(); |
| } |
| |
| @Override |
| public CompletableFuture<StateValue> getStateValueAsync(String key) { |
| return store.get(getPath(key)) |
| .thenApply(optRes -> |
| optRes.map(x -> |
| new StateValue(x.getValue(), x.getStat().getVersion(), null)) |
| .orElse(null)); |
| } |
| |
| @Override |
| public void incrCounter(String key, long amount) { |
| incrCounterAsync(key, amount).join(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> incrCounterAsync(String key, long amount) { |
| return countersCache.readModifyUpdateOrCreate(getPath(key), optValue -> |
| optValue.orElse(0L) + amount |
| ).thenApply(__ -> null); |
| } |
| |
| @Override |
| public long getCounter(String key) { |
| return getCounterAsync(key).join(); |
| } |
| |
| @Override |
| public CompletableFuture<Long> getCounterAsync(String key) { |
| return countersCache.get(getPath(key)) |
| .thenApply(optValue -> optValue.orElse(0L)); |
| } |
| |
| private String getPath(String key) { |
| return prefixPath + key; |
| } |
| } |