gradle-master/subprojects/internal-integ-testing/src/main/groovy/org/gradle/test/fixtures/server/http/BlockFilter.java
/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed 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.gradle.test.fixtures.server.http;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

public class BlockFilter implements Filter {

    private final int blockForSeconds;

    public BlockFilter(int blockForSeconds) {
        this.blockForSeconds = blockForSeconds;
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        CountDownLatch latch = new CountDownLatch(1);
        try {
            latch.await(blockForSeconds, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            // ignore
        }
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
    }
}
