com.google.gerrit.httpd.RequestContextFilter Maven / Gradle / Ivy
// Copyright (C) 2009 The Android Open Source Project
//
// 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 com.google.gerrit.httpd;
import com.google.gerrit.server.RequestCleanup;
import com.google.gerrit.server.util.RequestContext;
import com.google.gerrit.server.util.ThreadLocalRequestContext;
import com.google.inject.Inject;
import com.google.inject.Module;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.servlet.ServletModule;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/** Executes any pending {@link RequestCleanup} at the end of a request. */
@Singleton
public class RequestContextFilter implements Filter {
public static Module module() {
return new ServletModule() {
@Override
protected void configureServlets() {
filter("/*").through(RequestContextFilter.class);
}
};
}
private final Provider cleanup;
private final Provider requestContext;
private final ThreadLocalRequestContext local;
@Inject
RequestContextFilter(
Provider r, Provider c, ThreadLocalRequestContext l) {
cleanup = r;
requestContext = c;
local = l;
}
@Override
public void init(FilterConfig filterConfig) {}
@Override
public void destroy() {}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
RequestContext old = local.setContext(requestContext.get());
try {
try {
chain.doFilter(request, response);
} finally {
cleanup.get().run();
}
} finally {
local.setContext(old);
}
}
}