| /* |
| * 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.flink.statefun.flink.core.functions; |
| |
| import java.util.ArrayDeque; |
| import org.apache.flink.statefun.flink.core.message.Message; |
| import org.apache.flink.statefun.sdk.Address; |
| import org.apache.flink.statefun.sdk.StatefulFunction; |
| |
| /** An {@link StatefulFunction} instance with a mailbox. */ |
| final class FunctionActivation { |
| private final ArrayDeque<Message> mailbox; |
| private Address self; |
| private LiveFunction function; |
| |
| FunctionActivation() { |
| this.mailbox = new ArrayDeque<>(); |
| } |
| |
| void setFunction(Address self, LiveFunction function) { |
| this.self = self; |
| this.function = function; |
| } |
| |
| void add(Message message) { |
| mailbox.addLast(message); |
| } |
| |
| boolean hasPendingEnvelope() { |
| return !mailbox.isEmpty(); |
| } |
| |
| void applyNextPendingEnvelope(ApplyingContext context) { |
| Message message = mailbox.pollFirst(); |
| context.apply(function, message); |
| } |
| |
| Address self() { |
| return self; |
| } |
| } |