io.wcm.caravan.commons.httpasyncclient.impl.HttpClientTestUtils.java Source code

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Here is the source code for io.wcm.caravan.commons.httpasyncclient.impl.HttpClientTestUtils.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.caravan.commons.httpasyncclient.impl;

import java.lang.reflect.Field;

import org.apache.http.HttpHost;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.Registry;
import org.apache.http.conn.routing.HttpRoutePlanner;
import org.apache.http.impl.conn.DefaultProxyRoutePlanner;
import org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager;
import org.apache.http.nio.client.HttpAsyncClient;
import org.apache.http.nio.conn.SchemeIOSessionStrategy;

/**
 * Utility functions to get internal configuration settings from an HttpClient instance.
 * Assumes the instance is an instance of org.apache.http.impl.client.InternalHttpClient.
 */
public final class HttpClientTestUtils {

    private HttpClientTestUtils() {
        // static methods only
    }

    public static RequestConfig getDefaultRequestConfig(HttpAsyncClient httpClient) {
        return (RequestConfig) getField(httpClient, "defaultConfig");
    }

    public static int getConnectTimeout(HttpAsyncClient httpClient) {
        return getDefaultRequestConfig(httpClient).getConnectTimeout();
    }

    public static PoolingNHttpClientConnectionManager getConnectionManager(HttpAsyncClient httpClient) {
        return (PoolingNHttpClientConnectionManager) getField(httpClient, "connmgr");
    }

    public static CredentialsProvider getCredentialsProvider(HttpAsyncClient httpClient) {
        return (CredentialsProvider) getField(httpClient, "credentialsProvider");
    }

    public static HttpHost getProxyHost(HttpAsyncClient httpClient) {
        Object exec = getField(httpClient, "exec");
        HttpRoutePlanner routePlanner = (HttpRoutePlanner) getField(exec, "routePlanner");
        if (routePlanner instanceof DefaultProxyRoutePlanner) {
            return (HttpHost) getField(routePlanner, "proxy");
        } else {
            return null;
        }
    }

    @SuppressWarnings("unchecked")
    public static Registry<SchemeIOSessionStrategy> getSchemeRegistry(HttpAsyncClient httpClient) {
        PoolingNHttpClientConnectionManager connManager = getConnectionManager(httpClient);
        return (Registry<SchemeIOSessionStrategy>) getField(connManager, "iosessionFactoryRegistry");
    }

    private static Object getField(Object object, String fieldName) {
        return getField(object, object.getClass(), fieldName);
    }

    private static Object getField(Object object, Class clazz, String fieldName) {
        Field field;
        try {
            field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            return field.get(object);
        } catch (NoSuchFieldException ex) {
            Class superClazz = clazz.getSuperclass();
            if (superClazz != null) {
                return getField(object, superClazz, fieldName);
            } else {
                throw new RuntimeException("Unable to get field value for '" + fieldName + "'.", ex);
            }
        } catch (SecurityException | IllegalArgumentException | IllegalAccessException ex) {
            throw new RuntimeException("Unable to get field value for '" + fieldName + "'.", ex);
        }
    }

}