org.commonjava.test.http.stream.StreamServlet.java Source code

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Here is the source code for org.commonjava.test.http.stream.StreamServlet.java

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/**
 * Copyright (C) 2015 Red Hat, Inc. (jdcasey@commonjava.org)
 *
 * 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.commonjava.test.http.stream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.commonjava.test.http.common.CommonMethod;
import org.commonjava.test.http.expect.ContentResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;

public final class StreamServlet extends HttpServlet {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    private static final long serialVersionUID = 1L;

    private final Map<String, Integer> accessesByPath = new HashMap<>();

    private StreamResolver resolver;

    public StreamServlet() {
        throw new IllegalArgumentException("You cannot use the default constructor for StreamServlet. "
                + "It is designed to be passed into the StreamServer Undertow "
                + "instance using an ImmediateInstanceFactory.");
    }

    public StreamServlet(StreamResolver resolver) {
        this.resolver = resolver;
    }

    public Map<String, Integer> getAccessesByPath() {
        return accessesByPath;
    }

    public String getAccessKey(final String method, final String path) {
        return method.toUpperCase() + " " + path;
    }

    @Override
    protected void service(final HttpServletRequest req, final HttpServletResponse resp)
            throws ServletException, IOException {
        String wholePath;
        try {
            wholePath = new URI(req.getRequestURI()).getPath();
        } catch (final URISyntaxException e) {
            throw new ServletException("Cannot parse request URI", e);
        }

        String path = wholePath;
        if (path.length() > 1) {
            path = path.substring(1);
        }

        final String key = getAccessKey(req.getMethod(), wholePath);

        logger.info("Request: {}", key);
        final Integer i = accessesByPath.get(key);
        if (i == null) {
            accessesByPath.put(key, 1);
        } else {
            accessesByPath.put(key, i + 1);
        }

        logger.info("Looking for resource: '{}'", path);
        try (InputStream in = resolver.get(path); OutputStream out = resp.getOutputStream()) {
            if (in != null) {
                logger.info("Found: {}", in);
                resp.setStatus(200);
                IOUtils.copy(in, out);
            } else {
                logger.info("Not found: {}", path);
                resp.setStatus(404);
            }
        } catch (Exception e) {
            logger.info("Error retrieving: " + path + ". Reason: " + e.getMessage(), e);

            resp.setStatus(500);
            resp.getWriter().write(StringUtils.join(e.getStackTrace(), "\n"));
        }
    }

    public String getAccessKey(final CommonMethod method, final String path) {
        return getAccessKey(method.name(), path);
    }

    public Integer getAccessesFor(final String path) {
        return accessesByPath.get(getAccessKey(CommonMethod.GET, path));
    }

    public Integer getAccessesFor(final String method, final String path) {
        return accessesByPath.get(getAccessKey(method, path));
    }

}