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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (c) 2013, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.server.internal.monitoring;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.glassfish.jersey.server.monitoring.ResponseStatistics;

/**
 * Immutable response statistics.
 *
 * @author Miroslav Fuksa
 */
final class ResponseStatisticsImpl implements ResponseStatistics {

    private final Map responseCodes;
    private final Integer lastResponseCode;

    /**
     * This builder does not need to be threadsafe since it's called only from the jersey-background-task-scheduler.
     */
    static class Builder {

        private final Map responseCodesMap = new HashMap<>();
        private Integer lastResponseCode = null;

        private ResponseStatisticsImpl cached = null;

        void addResponseCode(final int responseCode) {
            cached = null;

            lastResponseCode = responseCode;
            Long currentValue = responseCodesMap.get(responseCode);
            if (currentValue == null) {
                currentValue = 0L;
            }
            responseCodesMap.put(responseCode, currentValue + 1);
        }

        ResponseStatisticsImpl build() {
            if (cached == null) {
                cached = new ResponseStatisticsImpl(lastResponseCode, new HashMap<>(this.responseCodesMap));
            }

            return cached;
        }

    }

    private ResponseStatisticsImpl(final Integer lastResponseCode, final Map responseCodes) {
        this.lastResponseCode = lastResponseCode;
        this.responseCodes = Collections.unmodifiableMap(responseCodes);
    }

    @Override
    public Integer getLastResponseCode() {
        return lastResponseCode;
    }

    @Override
    public Map getResponseCodes() {
        return responseCodes;
    }

    @Override
    public ResponseStatistics snapshot() {
        // this object is immutable
        return this;
    }
}