| /* |
| * 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 static java.nio.charset.StandardCharsets.UTF_8; |
| import static org.apache.bookkeeper.common.concurrent.FutureUtils.result; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.Unpooled; |
| import io.netty.util.ReferenceCountUtil; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.CompletableFuture; |
| import org.apache.bookkeeper.api.kv.Table; |
| import org.apache.bookkeeper.api.kv.options.Options; |
| import org.apache.pulsar.functions.api.StateStoreContext; |
| import org.apache.pulsar.functions.api.state.StateValue; |
| import org.apache.pulsar.functions.utils.FunctionCommon; |
| |
| /** |
| * This class accumulates the state updates from one function. |
| * |
| * <p>currently it exposes incr operations. but we can expose other key/values operations if needed. |
| */ |
| public class BKStateStoreImpl implements DefaultStateStore { |
| |
| private final String tenant; |
| private final String namespace; |
| private final String name; |
| private final String fqsn; |
| private final Table<ByteBuf, ByteBuf> table; |
| |
| public BKStateStoreImpl(String tenant, String namespace, String name, |
| Table<ByteBuf, ByteBuf> table) { |
| this.tenant = tenant; |
| this.namespace = namespace; |
| this.name = name; |
| this.table = table; |
| this.fqsn = FunctionCommon.getFullyQualifiedName(tenant, namespace, name); |
| } |
| |
| @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() { |
| table.close(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> incrCounterAsync(String key, long amount) { |
| // TODO: this can be optimized with a batch operation. |
| return table.increment( |
| Unpooled.wrappedBuffer(key.getBytes(UTF_8)), |
| amount); |
| } |
| |
| @Override |
| public void incrCounter(String key, long amount) { |
| try { |
| result(incrCounterAsync(key, amount)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to increment key '" + key + "' by amount '" + amount + "'", e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Long> getCounterAsync(String key) { |
| return table.getNumber(Unpooled.wrappedBuffer(key.getBytes(UTF_8))); |
| } |
| |
| @Override |
| public long getCounter(String key) { |
| try { |
| return result(getCounterAsync(key)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to retrieve counter from key '" + key + "'"); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Void> putAsync(String key, ByteBuffer value) { |
| if (value != null) { |
| // Set position to off the buffer to the beginning. |
| // If a user used an operation like ByteBuffer.allocate(4).putInt(count) |
| // to create a ByteBuffer to store to the state store |
| // the position of the buffer will be at the end and nothing will be written to table service |
| value.position(0); |
| return table.put( |
| Unpooled.wrappedBuffer(key.getBytes(UTF_8)), |
| Unpooled.wrappedBuffer(value)); |
| } else { |
| return table.put( |
| Unpooled.wrappedBuffer(key.getBytes(UTF_8)), |
| null); |
| } |
| } |
| |
| @Override |
| public void put(String key, ByteBuffer value) { |
| try { |
| result(putAsync(key, value)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to update the state value for key '" + key + "'"); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Void> deleteAsync(String key) { |
| return table.delete( |
| Unpooled.wrappedBuffer(key.getBytes(UTF_8)), |
| Options.delete() |
| ).thenApply(ignored -> null); |
| } |
| |
| @Override |
| public void delete(String key) { |
| try { |
| result(deleteAsync(key)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to delete the state value for key '" + key + "'"); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<ByteBuffer> getAsync(String key) { |
| return table.get(Unpooled.wrappedBuffer(key.getBytes(UTF_8))).thenApply( |
| data -> { |
| try { |
| if (data != null) { |
| ByteBuffer result = ByteBuffer.allocate(data.readableBytes()); |
| data.readBytes(result); |
| // Set position to off the buffer to the beginning, since the position after the |
| // read is going to be end of the buffer |
| // If we do not rewind to the beginning here, users will have to explicitly do |
| // this in their function code |
| // in order to use any of the ByteBuffer operations |
| result.position(0); |
| return result; |
| } |
| return null; |
| } finally { |
| if (data != null) { |
| ReferenceCountUtil.safeRelease(data); |
| } |
| } |
| } |
| ); |
| } |
| |
| @Override |
| public ByteBuffer get(String key) { |
| try { |
| return result(getAsync(key)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to retrieve the state value for key '" + key + "'", e); |
| } |
| } |
| |
| @Override |
| public StateValue getStateValue(String key) { |
| try { |
| return result(getStateValueAsync(key)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to retrieve the state value for key '" + key + "'", e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<StateValue> getStateValueAsync(String key) { |
| return table.getKv(Unpooled.wrappedBuffer(key.getBytes(UTF_8))).thenApply( |
| data -> { |
| try { |
| if (data != null && data.value() != null && data.value().readableBytes() >= 0) { |
| byte[] result = new byte[data.value().readableBytes()]; |
| data.value().readBytes(result); |
| return new StateValue(result, data.version(), data.isNumber()); |
| } |
| return null; |
| } finally { |
| if (data != null) { |
| ReferenceCountUtil.safeRelease(data); |
| } |
| } |
| } |
| ); |
| } |
| } |