Source Code Cross Referenced for PollBatch.java in  » Ajax » dwr » org » directwebremoting » dwrp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » dwr » org.directwebremoting.dwrp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005 Joe Walker
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:        package org.directwebremoting.dwrp;
017:
018:        import java.util.Map;
019:
020:        import javax.servlet.http.HttpServletRequest;
021:
022:        import org.directwebremoting.extend.FormField;
023:        import org.directwebremoting.extend.ServerException;
024:        import org.directwebremoting.util.Messages;
025:
026:        /**
027:         * A container for the information passed in by an Poll request
028:         * @author Joe Walker [joe at getahead dot ltd dot uk]
029:         */
030:        public class PollBatch {
031:            /**
032:             * @param request The request to parse to fill out this batch
033:             * @throws ServerException
034:             */
035:            public PollBatch(HttpServletRequest request) throws ServerException {
036:                debug = request.getHeader("User-Agent");
037:                get = "GET".equals(request.getMethod());
038:
039:                ParseUtil parseUtil = new ParseUtil();
040:                allParameters = parseUtil.parseRequest(request);
041:
042:                parseParameters();
043:            }
044:
045:            /**
046:             * Fish out the important parameters
047:             */
048:            protected void parseParameters() {
049:                batchId = extractParameter(allParameters,
050:                        ProtocolConstants.INBOUND_KEY_BATCHID);
051:                scriptSessionId = extractParameter(allParameters,
052:                        ProtocolConstants.INBOUND_KEY_SCRIPT_SESSIONID);
053:                page = extractParameter(allParameters,
054:                        ProtocolConstants.INBOUND_KEY_PAGE);
055:                windowName = extractParameter(allParameters,
056:                        ProtocolConstants.INBOUND_KEY_WINDOWNAME);
057:                String prString = extractParameter(allParameters,
058:                        ProtocolConstants.INBOUND_KEY_PARTIAL_RESPONSE);
059:                partialResponse = PartialResponse.fromOrdinal(prString);
060:            }
061:
062:            /**
063:             * Extract a parameter and ensure it is in the request.
064:             * This is needed to cope with Jetty continuations that are not real
065:             * continuations.
066:             * @param parameters The parameter list parsed out of the request
067:             * @param paramName The name of the parameter sent
068:             * @return The found value
069:             */
070:            protected String extractParameter(
071:                    Map<String, FormField> parameters, String paramName) {
072:                FormField formField = parameters.remove(paramName);
073:                if (formField == null) {
074:                    throw new IllegalArgumentException(Messages.getString(
075:                            "PollHandler.MissingParameter", paramName));
076:                }
077:
078:                return formField.getString();
079:            }
080:
081:            /**
082:             * @return the batchId
083:             */
084:            public String getBatchId() {
085:                return batchId;
086:            }
087:
088:            /**
089:             * @return the partialResponse
090:             */
091:            public PartialResponse getPartialResponse() {
092:                return partialResponse;
093:            }
094:
095:            /**
096:             * @return the scriptSessionId
097:             */
098:            public String getScriptSessionId() {
099:                return scriptSessionId;
100:            }
101:
102:            /**
103:             * @return the page
104:             */
105:            public String getPage() {
106:                return page;
107:            }
108:
109:            /**
110:             * @return the window name
111:             */
112:            public String getWindowName() {
113:                return windowName;
114:            }
115:
116:            /**
117:             * Is this request from a GET?
118:             * @return true if the request is a GET request
119:             */
120:            public boolean isGet() {
121:                return get;
122:            }
123:
124:            /* (non-Javadoc)
125:             * @see java.lang.Object#toString()
126:             */
127:            @Override
128:            public String toString() {
129:                return "PollBatch[partResp=" + partialResponse + ",debug="
130:                        + debug + "]";
131:            }
132:
133:            /**
134:             * The ID of this batch from the browser
135:             */
136:            private String batchId;
137:
138:            /**
139:             * Does the browser want partial responses?
140:             */
141:            private PartialResponse partialResponse;
142:
143:            /**
144:             * A quick string for debug purposes
145:             */
146:            private String debug;
147:
148:            /**
149:             * The page that the request was sent from
150:             */
151:            private String page;
152:
153:            /**
154:             * Window name is used by reverse ajax to get around the 2 connection limit
155:             */
156:            private String windowName;
157:
158:            /**
159:             * The unique ID sent to the current page
160:             */
161:            private String scriptSessionId;
162:
163:            /**
164:             * Is it a GET request?
165:             */
166:            private boolean get;
167:
168:            /**
169:             * All the parameters sent by the browser
170:             */
171:            private Map<String, FormField> allParameters;
172:        }
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