org.eclipse.aether.transport.http.GlobalState.java Source code

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Here is the source code for org.eclipse.aether.transport.http.GlobalState.java

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package org.eclipse.aether.transport.http;

/*
 * 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.
 */

import java.io.Closeable;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import org.apache.http.HttpHost;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.conn.PoolingClientConnectionManager;
import org.eclipse.aether.RepositoryCache;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.util.ConfigUtils;

/**
 * Container for HTTP-related state that can be shared across incarnations of the transporter to optimize the
 * communication with servers.
 */
final class GlobalState implements Closeable {

    static class CompoundKey {

        private final Object[] keys;

        CompoundKey(Object... keys) {
            this.keys = keys;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }
            if (obj == null || !getClass().equals(obj.getClass())) {
                return false;
            }
            CompoundKey that = (CompoundKey) obj;
            return Arrays.equals(keys, that.keys);
        }

        @Override
        public int hashCode() {
            int hash = 17;
            hash = hash * 31 + Arrays.hashCode(keys);
            return hash;
        }

        @Override
        public String toString() {
            return Arrays.toString(keys);
        }
    }

    private static final String KEY = GlobalState.class.getName();

    private static final String CONFIG_PROP_CACHE_STATE = "aether.connector.http.cacheState";

    private final ConcurrentMap<SslConfig, ClientConnectionManager> connectionManagers;

    private final ConcurrentMap<CompoundKey, Object> userTokens;

    private final ConcurrentMap<HttpHost, AuthSchemePool> authSchemePools;

    private final ConcurrentMap<CompoundKey, Boolean> expectContinues;

    public static GlobalState get(RepositorySystemSession session) {
        GlobalState cache;
        RepositoryCache repoCache = session.getCache();
        if (repoCache == null || !ConfigUtils.getBoolean(session, true, CONFIG_PROP_CACHE_STATE)) {
            cache = null;
        } else {
            Object tmp = repoCache.get(session, KEY);
            if (tmp instanceof GlobalState) {
                cache = (GlobalState) tmp;
            } else {
                synchronized (GlobalState.class) {
                    tmp = repoCache.get(session, KEY);
                    if (tmp instanceof GlobalState) {
                        cache = (GlobalState) tmp;
                    } else {
                        cache = new GlobalState();
                        repoCache.put(session, KEY, cache);
                    }
                }
            }
        }
        return cache;
    }

    private GlobalState() {
        connectionManagers = new ConcurrentHashMap<SslConfig, ClientConnectionManager>();
        userTokens = new ConcurrentHashMap<CompoundKey, Object>();
        authSchemePools = new ConcurrentHashMap<HttpHost, AuthSchemePool>();
        expectContinues = new ConcurrentHashMap<CompoundKey, Boolean>();
    }

    public void close() {
        for (Iterator<Map.Entry<SslConfig, ClientConnectionManager>> it = connectionManagers.entrySet()
                .iterator(); it.hasNext();) {
            ClientConnectionManager connMgr = it.next().getValue();
            it.remove();
            connMgr.shutdown();
        }
    }

    public ClientConnectionManager getConnectionManager(SslConfig config) {
        ClientConnectionManager manager = connectionManagers.get(config);
        if (manager == null) {
            ClientConnectionManager connMgr = newConnectionManager(config);
            manager = connectionManagers.putIfAbsent(config, connMgr);
            if (manager != null) {
                connMgr.shutdown();
            } else {
                manager = connMgr;
            }
        }
        return manager;
    }

    public static ClientConnectionManager newConnectionManager(SslConfig sslConfig) {
        SchemeRegistry schemeReg = new SchemeRegistry();
        schemeReg.register(new Scheme("http", 80, new PlainSocketFactory()));
        schemeReg.register(new Scheme("https", 443, new SslSocketFactory(sslConfig)));

        PoolingClientConnectionManager connMgr = new PoolingClientConnectionManager(schemeReg);
        connMgr.setMaxTotal(100);
        connMgr.setDefaultMaxPerRoute(50);
        return connMgr;
    }

    public Object getUserToken(CompoundKey key) {
        return userTokens.get(key);
    }

    public void setUserToken(CompoundKey key, Object userToken) {
        if (userToken != null) {
            userTokens.put(key, userToken);
        } else {
            userTokens.remove(key);
        }
    }

    public ConcurrentMap<HttpHost, AuthSchemePool> getAuthSchemePools() {
        return authSchemePools;
    }

    public Boolean getExpectContinue(CompoundKey key) {
        return expectContinues.get(key);
    }

    public void setExpectContinue(CompoundKey key, boolean enabled) {
        expectContinues.put(key, enabled);
    }

}