Java tutorial
/** * Copyright 2005-2014 The Kuali Foundation * * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php * * 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.kuali.rice.ksb.messaging; import org.apache.commons.httpclient.HttpMethodRetryHandler; import org.apache.commons.httpclient.HttpVersion; import org.apache.commons.httpclient.params.HostParams; import org.apache.commons.httpclient.params.HttpClientParams; import org.apache.commons.httpclient.params.HttpConnectionManagerParams; import org.apache.commons.httpclient.params.HttpConnectionParams; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.commons.httpclient.params.HttpParams; import org.kuali.rice.core.api.util.ClassLoaderUtils; import java.util.Collection; import java.util.HashMap; import java.util.Map; /** * Contains some utility methods for dealing with configuration of the * Commons HttpClient library. Specifically, HttpClient parameters are * typed, so we can't just pipe the String values from or configuration * through. Instead we need to know the type of all the different * HttpClient parameters and set the parameter accordingly. * * @author Kuali Rice Team (rice.collab@kuali.org) */ public class HttpClientHelper { /** * A Map which defines the type for all non-String parameters for HttpClient. */ private static final Map<String, Class<?>> PARAM_TYPE_MAP = new HashMap<String, Class<?>>(); static { PARAM_TYPE_MAP.put(HttpMethodParams.PROTOCOL_VERSION, HttpVersion.class); PARAM_TYPE_MAP.put(HttpMethodParams.UNAMBIGUOUS_STATUS_LINE, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.SINGLE_COOKIE_HEADER, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.STRICT_TRANSFER_ENCODING, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.REJECT_HEAD_BODY, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.HEAD_BODY_CHECK_TIMEOUT, Integer.class); PARAM_TYPE_MAP.put(HttpMethodParams.USE_EXPECT_CONTINUE, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.WARN_EXTRA_INPUT, Boolean.class); PARAM_TYPE_MAP.put(HttpMethodParams.STATUS_LINE_GARBAGE_LIMIT, Integer.class); PARAM_TYPE_MAP.put(HttpMethodParams.SO_TIMEOUT, Integer.class); PARAM_TYPE_MAP.put(HttpMethodParams.RETRY_HANDLER, HttpMethodRetryHandler.class); PARAM_TYPE_MAP.put(HttpMethodParams.DATE_PATTERNS, Collection.class); PARAM_TYPE_MAP.put(HttpMethodParams.BUFFER_WARN_TRIGGER_LIMIT, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.SO_TIMEOUT, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.TCP_NODELAY, Boolean.class); PARAM_TYPE_MAP.put(HttpConnectionParams.SO_SNDBUF, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.SO_RCVBUF, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.SO_LINGER, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.CONNECTION_TIMEOUT, Integer.class); PARAM_TYPE_MAP.put(HttpConnectionParams.STALE_CONNECTION_CHECK, Boolean.class); PARAM_TYPE_MAP.put(HttpConnectionManagerParams.MAX_HOST_CONNECTIONS, Map.class); PARAM_TYPE_MAP.put(HttpConnectionManagerParams.MAX_TOTAL_CONNECTIONS, Integer.class); PARAM_TYPE_MAP.put(HostParams.DEFAULT_HEADERS, Collection.class); PARAM_TYPE_MAP.put(HttpClientParams.CONNECTION_MANAGER_TIMEOUT, Long.class); PARAM_TYPE_MAP.put(HttpClientParams.CONNECTION_MANAGER_CLASS, Class.class); PARAM_TYPE_MAP.put(HttpClientParams.PREEMPTIVE_AUTHENTICATION, Boolean.class); PARAM_TYPE_MAP.put(HttpClientParams.REJECT_RELATIVE_REDIRECT, Boolean.class); PARAM_TYPE_MAP.put(HttpClientParams.MAX_REDIRECTS, Integer.class); PARAM_TYPE_MAP.put(HttpClientParams.ALLOW_CIRCULAR_REDIRECTS, Boolean.class); } public static void setParameter(HttpParams params, String paramName, String paramValue) { Class<?> paramType = getParameterType(paramName); if (paramType.equals(Boolean.class)) { params.setBooleanParameter(paramName, Boolean.parseBoolean(paramValue)); } else if (paramType.equals(Integer.class)) { params.setIntParameter(paramName, Integer.parseInt(paramValue)); } else if (paramType.equals(Long.class)) { params.setLongParameter(paramName, Long.parseLong(paramValue)); } else if (paramType.equals(Double.class)) { params.setDoubleParameter(paramName, Double.parseDouble(paramValue)); } else if (paramType.equals(String.class)) { params.setParameter(paramName, paramValue); } else if (paramType.equals(Class.class)) { try { Class<?> configuredClass = Class.forName(paramValue, true, ClassLoaderUtils.getDefaultClassLoader()); params.setParameter(paramName, configuredClass); } catch (ClassNotFoundException e) { throw new RuntimeException("Could not locate the class needed to configure the HttpClient.", e); } } else { throw new RuntimeException("Attempted to configure an HttpClient parameter '" + paramName + "' " + "of a type not supported through Workflow configuration: " + paramType.getName()); } } /** * Returns the expected type of the given HttpClient parameter. String is the default. */ public static Class getParameterType(String parameterName) { Class<?> parameterType = PARAM_TYPE_MAP.get(parameterName); if (parameterType == null) { parameterType = String.class; } return parameterType; } }