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package org.mule.transport.http.components; |
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import org.mule.DefaultMuleMessage; |
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import org.mule.RequestContext; |
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import org.mule.api.MuleEvent; |
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import org.mule.api.MuleException; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.routing.filter.Filter; |
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import org.mule.component.AbstractComponent; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.routing.filters.MessagePropertyFilter; |
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import org.mule.transport.NullPayload; |
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import org.mule.util.expression.ExpressionEvaluator; |
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import org.mule.util.expression.ExpressionEvaluatorManager; |
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|
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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|
42 | 2 | public class RestServiceWrapper extends AbstractComponent |
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{ |
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|
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public static final String GET = "GET"; |
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public static final String CONTENT_TYPE = "Content-Type"; |
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public static final String CONTENT_TYPE_VALUE = "application/x-www-form-urlencoded"; |
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public static final String HTTP_METHOD = "http.method"; |
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53 | 2 | protected transient Log logger = LogFactory.getLog(getClass()); |
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private String serviceUrl; |
56 | 2 | private Map requiredParams = new HashMap(); |
57 | 2 | private Map optionalParams = new HashMap(); |
58 | 2 | private String httpMethod = "GET"; |
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private List payloadParameterNames; |
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private Filter errorFilter; |
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|
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public String getServiceUrl() |
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{ |
64 | 2 | return serviceUrl; |
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} |
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public void setServiceUrl(String serviceUrl) |
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{ |
69 | 2 | this.serviceUrl = serviceUrl; |
70 | 2 | } |
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public Map getRequiredParams() |
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{ |
75 | 8 | return requiredParams; |
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} |
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public void setRequiredParams(Map requiredParams) |
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{ |
88 | 2 | this.requiredParams = requiredParams; |
89 | 2 | } |
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public Map getOptionalParams() |
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{ |
100 | 8 | return optionalParams; |
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} |
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public void setOptionalParams(Map optionalParams) |
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{ |
105 | 2 | this.optionalParams = optionalParams; |
106 | 2 | } |
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public String getHttpMethod() |
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{ |
110 | 2 | return httpMethod; |
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} |
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public void setHttpMethod(String httpMethod) |
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{ |
115 | 2 | this.httpMethod = httpMethod; |
116 | 2 | } |
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public List getPayloadParameterNames() |
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{ |
120 | 8 | return payloadParameterNames; |
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} |
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public void setPayloadParameterNames(List payloadParameterNames) |
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{ |
125 | 2 | this.payloadParameterNames = payloadParameterNames; |
126 | 2 | } |
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public Filter getFilter() |
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{ |
130 | 6 | return errorFilter; |
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} |
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public void setFilter(Filter errorFilter) |
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{ |
135 | 2 | this.errorFilter = errorFilter; |
136 | 2 | } |
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protected void doInitialise() throws InitialisationException |
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{ |
141 | 2 | if (serviceUrl == null) |
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{ |
143 | 0 | throw new InitialisationException(CoreMessages.objectIsNull("serviceUrl"), this); |
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} |
145 | 2 | else if (!ExpressionEvaluatorManager.isValidExpression(serviceUrl)) |
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{ |
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try |
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{ |
149 | 0 | new URL(serviceUrl); |
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} |
151 | 0 | catch (MalformedURLException e) |
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{ |
153 | 0 | throw new InitialisationException(e, this); |
154 | 0 | } |
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} |
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|
157 | 2 | if (errorFilter == null) |
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{ |
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|
160 | 0 | errorFilter = new MessagePropertyFilter("http.status!=200"); |
161 | 0 | logger.info("Setting default error filter to MessagePropertyFilter('http.status!=200')"); |
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} |
163 | 2 | } |
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|
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public MuleMessage doOnCall(MuleEvent event) throws Exception |
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{ |
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Object requestBody; |
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|
169 | 0 | Object request = event.transformMessage(); |
170 | 0 | String tempUrl = serviceUrl; |
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MuleMessage result; |
172 | 0 | if (ExpressionEvaluatorManager.isValidExpression(serviceUrl)) |
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{ |
174 | 0 | tempUrl = ExpressionEvaluatorManager.parse(serviceUrl, event.getMessage(), true); |
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} |
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|
177 | 0 | StringBuffer urlBuffer = new StringBuffer(tempUrl); |
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|
179 | 0 | if (GET.equalsIgnoreCase(this.httpMethod)) |
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{ |
181 | 0 | requestBody = NullPayload.getInstance(); |
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|
183 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, requiredParams, false, null); |
184 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, optionalParams, true, null); |
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} |
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else |
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|
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{ |
189 | 0 | StringBuffer requestBodyBuffer = new StringBuffer(); |
190 | 0 | event.getMessage().setProperty(CONTENT_TYPE, CONTENT_TYPE_VALUE); |
191 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, requiredParams, false, requestBodyBuffer); |
192 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, optionalParams, true, requestBodyBuffer); |
193 | 0 | requestBody = requestBodyBuffer.toString(); |
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} |
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|
196 | 0 | tempUrl = urlBuffer.toString(); |
197 | 0 | logger.info("Invoking REST service: " + tempUrl); |
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|
199 | 0 | event.getMessage().setProperty(HTTP_METHOD, httpMethod); |
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|
201 | 0 | result = RequestContext.getEventContext().sendEvent( |
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new DefaultMuleMessage(requestBody, event.getMessage()), tempUrl); |
203 | 0 | if (isErrorPayload(result)) |
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{ |
205 | 0 | handleException(new RestServiceException(CoreMessages.failedToInvokeRestService(tempUrl), result), |
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result); |
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} |
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|
209 | 0 | return result; |
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} |
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|
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private String getSeparator(String url) |
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{ |
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String sep; |
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|
216 | 0 | if (url.indexOf("?") > -1) |
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{ |
218 | 0 | sep = "&"; |
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} |
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else |
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{ |
222 | 0 | sep = "?"; |
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} |
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|
225 | 0 | return sep; |
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} |
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|
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private String updateSeparator(String sep) |
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{ |
230 | 0 | if (sep.compareTo("?") == 0 || sep.compareTo("") == 0) |
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{ |
232 | 0 | return ("&"); |
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} |
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|
235 | 0 | return sep; |
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} |
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private void setRESTParams(StringBuffer url, |
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MuleMessage msg, |
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Object body, |
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Map args, |
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boolean optional, |
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StringBuffer requestBodyBuffer) |
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{ |
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String sep; |
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|
251 | 0 | if (requestBodyBuffer == null) |
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{ |
253 | 0 | sep = getSeparator(url.toString()); |
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} |
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else |
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{ |
257 | 0 | sep = ""; |
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} |
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|
260 | 0 | for (Iterator iterator = args.entrySet().iterator(); iterator.hasNext();) |
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{ |
262 | 0 | Map.Entry entry = (Map.Entry) iterator.next(); |
263 | 0 | String name = (String) entry.getKey(); |
264 | 0 | String exp = (String) entry.getValue(); |
265 | 0 | Object value = ExpressionEvaluatorManager.evaluate(exp, msg); |
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|
267 | 0 | if (value == null) |
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{ |
269 | 0 | if (!optional) |
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{ |
271 | 0 | throw new IllegalArgumentException(CoreMessages.propertyIsNotSetOnEvent(exp).toString()); |
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} |
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} |
274 | 0 | else if (requestBodyBuffer != null) |
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{ |
276 | 0 | requestBodyBuffer.append(sep); |
277 | 0 | requestBodyBuffer.append(name).append('=').append(value); |
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} |
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else |
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{ |
281 | 0 | url.append(sep); |
282 | 0 | url.append(name).append('=').append(value); |
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} |
284 | |
|
285 | 0 | sep = updateSeparator(sep); |
286 | 0 | } |
287 | |
|
288 | 0 | if (!optional && payloadParameterNames != null) |
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{ |
290 | 0 | if (body instanceof Object[]) |
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{ |
292 | 0 | Object[] requestArray = (Object[]) body; |
293 | 0 | for (int i = 0; i < payloadParameterNames.size(); i++) |
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{ |
295 | 0 | if (requestBodyBuffer != null) |
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{ |
297 | 0 | requestBodyBuffer.append(sep).append(payloadParameterNames.get(i)).append('=').append( |
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requestArray[i].toString()); |
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} |
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else |
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{ |
302 | 0 | url.append(sep).append(payloadParameterNames.get(i)).append('=').append( |
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requestArray[i].toString()); |
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} |
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|
306 | 0 | sep = updateSeparator(sep); |
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} |
308 | 0 | } |
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else |
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{ |
311 | 0 | if (payloadParameterNames.get(0) != null) |
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{ |
313 | 0 | if (requestBodyBuffer != null) |
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{ |
315 | 0 | requestBodyBuffer.append(payloadParameterNames.get(0)).append('=').append(body.toString()); |
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} |
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else |
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{ |
319 | 0 | url.append(sep).append(payloadParameterNames.get(0)).append('=').append(body.toString()); |
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} |
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} |
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} |
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} |
324 | 0 | } |
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|
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protected boolean isErrorPayload(MuleMessage message) |
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{ |
328 | 0 | return errorFilter != null && errorFilter.accept(message); |
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} |
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|
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protected void handleException(RestServiceException e, MuleMessage result) throws Exception |
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{ |
333 | 0 | throw e; |
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} |
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|
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|
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protected void doOnEvent(MuleEvent event) |
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{ |
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try |
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{ |
341 | 0 | onCall(event); |
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} |
343 | 0 | catch (MuleException e) |
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{ |
345 | 0 | logger.error(e); |
346 | 0 | } |
347 | 0 | } |
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|
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|
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protected void doDispose() |
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{ |
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|
353 | 4 | } |
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|
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|
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protected void doStart() throws MuleException |
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{ |
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|
359 | 2 | } |
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|
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|
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protected void doStop() throws MuleException |
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{ |
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|
365 | 2 | } |
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} |