| /** |
| * 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 backtype.storm.messaging; |
| |
| public abstract class ConnectionWithStatus implements IConnection { |
| |
| public static enum Status { |
| |
| /** |
| * we are establishing a active connection with target host. The new data sending request can be buffered for future sending, or dropped(cases like |
| * there is no enough memory). It varies with difference IConnection implementations. |
| */ |
| Connecting, |
| |
| /** |
| * We have a alive connection channel, which can be used to transfer data. |
| */ |
| Ready, |
| |
| /** |
| * The connection channel is closed or being closed. We don't accept further data sending or receiving. All data sending request will be dropped. |
| */ |
| Closed |
| }; |
| |
| /** |
| * whether this connection is available to transfer data |
| */ |
| public abstract Status status(); |
| |
| } |