| /* |
| * 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.shardingsphere.elasticjob.restful.filter; |
| |
| import com.google.common.base.Preconditions; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.handler.codec.http.FullHttpRequest; |
| import io.netty.util.ReferenceCountUtil; |
| import org.apache.shardingsphere.elasticjob.restful.Filter; |
| import org.apache.shardingsphere.elasticjob.restful.handler.HandleContext; |
| |
| import java.util.List; |
| |
| /** |
| * Default filter chain. |
| */ |
| public final class DefaultFilterChain implements FilterChain { |
| |
| private final Filter[] filters; |
| |
| private final ChannelHandlerContext ctx; |
| |
| private final HandleContext<?> handleContext; |
| |
| private int current; |
| |
| private boolean finished; |
| |
| public DefaultFilterChain(final List<Filter> filterInstances, final ChannelHandlerContext ctx, final HandleContext<?> handleContext) { |
| filters = filterInstances.toArray(new Filter[0]); |
| this.ctx = ctx; |
| this.handleContext = handleContext; |
| } |
| |
| @Override |
| public void next(final FullHttpRequest httpRequest) { |
| Preconditions.checkState(!finished, "FilterChain has already finished."); |
| if (current < filters.length) { |
| Filter currentFilter = filters[current++]; |
| boolean passThrough = currentFilter.doFilter(httpRequest, handleContext.getHttpResponse(), this); |
| if (!passThrough) { |
| finished = true; |
| doResponse(); |
| } |
| return; |
| } |
| finished = true; |
| ctx.fireChannelRead(handleContext); |
| } |
| |
| private void doResponse() { |
| try { |
| ctx.writeAndFlush(handleContext.getHttpResponse()); |
| } finally { |
| ReferenceCountUtil.release(handleContext.getHttpRequest()); |
| } |
| } |
| } |