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package org.mule.transport.http.components; |
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import org.mule.DefaultMuleEventContext; |
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import org.mule.DefaultMuleMessage; |
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import org.mule.MessageExchangePattern; |
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import org.mule.api.MuleEvent; |
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import org.mule.api.MuleEventContext; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.endpoint.EndpointBuilder; |
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import org.mule.api.endpoint.OutboundEndpoint; |
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import org.mule.api.expression.ExpressionEvaluator; |
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import org.mule.api.expression.RequiredValueException; |
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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.endpoint.EndpointURIEndpointBuilder; |
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import org.mule.routing.filters.ExpressionFilter; |
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import org.mule.transport.NullPayload; |
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import org.mule.transport.http.HttpConnector; |
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import org.mule.transport.http.HttpConstants; |
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import org.mule.util.StringUtils; |
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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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|
49 | 0 | public class RestServiceWrapper extends AbstractComponent |
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{ |
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public static final String DELETE = HttpConstants.METHOD_DELETE; |
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public static final String GET = HttpConstants.METHOD_GET; |
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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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|
60 | 0 | protected transient Log logger = LogFactory.getLog(getClass()); |
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private String serviceUrl; |
63 | 0 | private Map requiredParams = new HashMap(); |
64 | 0 | private Map optionalParams = new HashMap(); |
65 | 0 | 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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{ |
71 | 0 | return serviceUrl; |
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} |
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public void setServiceUrl(String serviceUrl) |
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{ |
76 | 0 | this.serviceUrl = serviceUrl; |
77 | 0 | } |
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public Map getRequiredParams() |
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{ |
81 | 0 | return requiredParams; |
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} |
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public void setRequiredParams(Map requiredParams) |
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{ |
94 | 0 | this.requiredParams = requiredParams; |
95 | 0 | } |
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public Map getOptionalParams() |
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{ |
104 | 0 | return optionalParams; |
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} |
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public void setOptionalParams(Map optionalParams) |
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{ |
109 | 0 | this.optionalParams = optionalParams; |
110 | 0 | } |
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public String getHttpMethod() |
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{ |
114 | 0 | return httpMethod; |
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} |
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public void setHttpMethod(String httpMethod) |
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{ |
119 | 0 | this.httpMethod = httpMethod; |
120 | 0 | } |
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public List getPayloadParameterNames() |
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{ |
124 | 0 | return payloadParameterNames; |
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} |
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public void setPayloadParameterNames(List payloadParameterNames) |
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{ |
129 | 0 | this.payloadParameterNames = payloadParameterNames; |
130 | 0 | } |
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public Filter getFilter() |
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{ |
134 | 0 | return errorFilter; |
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} |
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public void setFilter(Filter errorFilter) |
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{ |
139 | 0 | this.errorFilter = errorFilter; |
140 | 0 | } |
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@Override |
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protected void doInitialise() throws InitialisationException |
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{ |
145 | 0 | if (serviceUrl == null) |
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{ |
147 | 0 | throw new InitialisationException(CoreMessages.objectIsNull("serviceUrl"), this); |
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} |
149 | 0 | else if (!muleContext.getExpressionManager().isExpression(serviceUrl)) |
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{ |
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try |
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{ |
153 | 0 | new URL(serviceUrl); |
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} |
155 | 0 | catch (MalformedURLException e) |
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{ |
157 | 0 | throw new InitialisationException(e, this); |
158 | 0 | } |
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} |
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|
161 | 0 | if (errorFilter == null) |
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{ |
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|
164 | 0 | errorFilter = new ExpressionFilter("#[header:INBOUND:http.status!=200]"); |
165 | 0 | logger.info("Setting default error filter to ExpressionFilter('#[header:INBOUND:http.status!=200]')"); |
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} |
167 | 0 | } |
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|
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@Override |
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public Object doInvoke(MuleEvent event) throws Exception |
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{ |
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Object requestBody; |
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|
174 | 0 | Object request = event.getMessage().getPayload(); |
175 | 0 | String tempUrl = serviceUrl; |
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MuleMessage result; |
177 | 0 | if (muleContext.getExpressionManager().isExpression(serviceUrl)) |
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{ |
179 | 0 | muleContext.getExpressionManager().validateExpression(serviceUrl); |
180 | 0 | tempUrl = muleContext.getExpressionManager().parse(serviceUrl, event.getMessage(), true); |
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} |
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|
183 | 0 | StringBuffer urlBuffer = new StringBuffer(tempUrl); |
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|
185 | 0 | if (GET.equalsIgnoreCase(this.httpMethod) || DELETE.equalsIgnoreCase(this.httpMethod)) |
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{ |
187 | 0 | requestBody = NullPayload.getInstance(); |
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|
189 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, requiredParams, false, null); |
190 | 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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{ |
195 | 0 | StringBuffer requestBodyBuffer = new StringBuffer(); |
196 | 0 | event.getMessage().setOutboundProperty(HttpConstants.HEADER_CONTENT_TYPE, CONTENT_TYPE_VALUE); |
197 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, requiredParams, false, requestBodyBuffer); |
198 | 0 | setRESTParams(urlBuffer, event.getMessage(), request, optionalParams, true, requestBodyBuffer); |
199 | 0 | requestBody = requestBodyBuffer.toString(); |
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} |
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|
202 | 0 | tempUrl = urlBuffer.toString(); |
203 | 0 | logger.info("Invoking REST service: " + tempUrl); |
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|
205 | 0 | event.getMessage().setOutboundProperty(HttpConnector.HTTP_METHOD_PROPERTY, httpMethod); |
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|
207 | 0 | EndpointBuilder endpointBuilder = new EndpointURIEndpointBuilder(tempUrl, muleContext); |
208 | 0 | endpointBuilder.setExchangePattern(MessageExchangePattern.REQUEST_RESPONSE); |
209 | 0 | OutboundEndpoint outboundEndpoint = endpointBuilder.buildOutboundEndpoint(); |
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|
211 | 0 | MuleEventContext eventContext = new DefaultMuleEventContext(event); |
212 | 0 | result = eventContext.sendEvent( |
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new DefaultMuleMessage(requestBody, event.getMessage(), muleContext), outboundEndpoint); |
214 | 0 | if (isErrorPayload(result)) |
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{ |
216 | 0 | handleException(new RestServiceException(CoreMessages.failedToInvokeRestService(tempUrl), |
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event), result); |
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} |
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|
220 | 0 | return result; |
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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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|
227 | 0 | if (url.indexOf("?") > -1) |
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{ |
229 | 0 | sep = "&"; |
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} |
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else |
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{ |
233 | 0 | sep = "?"; |
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} |
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|
236 | 0 | return sep; |
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} |
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private String updateSeparator(String sep) |
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{ |
241 | 0 | if (sep.compareTo("?") == 0 || sep.compareTo("") == 0) |
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{ |
243 | 0 | return ("&"); |
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} |
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|
246 | 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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|
262 | 0 | if (requestBodyBuffer == null) |
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{ |
264 | 0 | sep = getSeparator(url.toString()); |
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} |
266 | 0 | else if(requestBodyBuffer.length() > 0) |
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{ |
268 | 0 | sep = "&"; |
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} |
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else |
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{ |
272 | 0 | sep = StringUtils.EMPTY; |
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} |
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|
275 | 0 | for (Iterator iterator = args.entrySet().iterator(); iterator.hasNext();) |
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{ |
277 | 0 | Map.Entry entry = (Map.Entry) iterator.next(); |
278 | 0 | String name = (String) entry.getKey(); |
279 | 0 | String exp = (String) entry.getValue(); |
280 | 0 | Object value = null; |
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|
282 | 0 | if (muleContext.getExpressionManager().isExpression(exp)) |
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{ |
284 | 0 | muleContext.getExpressionManager().validateExpression(exp); |
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try |
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{ |
287 | 0 | value = muleContext.getExpressionManager().evaluate(exp, msg); |
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} |
289 | 0 | catch (RequiredValueException e) |
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{ |
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|
292 | 0 | } |
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} |
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else |
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{ |
296 | 0 | value = exp; |
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} |
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|
299 | 0 | if (value == null) |
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{ |
301 | 0 | if (!optional) |
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{ |
303 | 0 | throw new IllegalArgumentException(CoreMessages.propertyIsNotSetOnEvent(exp).toString()); |
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} |
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} |
306 | 0 | else if (requestBodyBuffer != null) |
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{ |
308 | 0 | requestBodyBuffer.append(sep); |
309 | 0 | requestBodyBuffer.append(name).append('=').append(value); |
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} |
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else |
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{ |
313 | 0 | url.append(sep); |
314 | 0 | url.append(name).append('=').append(value); |
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} |
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|
317 | 0 | sep = updateSeparator(sep); |
318 | 0 | } |
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|
320 | 0 | if (!optional && payloadParameterNames != null) |
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{ |
322 | 0 | if (body instanceof Object[]) |
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{ |
324 | 0 | Object[] requestArray = (Object[]) body; |
325 | 0 | for (int i = 0; i < payloadParameterNames.size(); i++) |
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{ |
327 | 0 | if (requestBodyBuffer != null) |
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{ |
329 | 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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{ |
334 | 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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|
338 | 0 | sep = updateSeparator(sep); |
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} |
340 | 0 | } |
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else |
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{ |
343 | 0 | if (payloadParameterNames.get(0) != null) |
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{ |
345 | 0 | if (requestBodyBuffer != null) |
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{ |
347 | 0 | requestBodyBuffer.append(payloadParameterNames.get(0)).append('=').append(body.toString()); |
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} |
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else |
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{ |
351 | 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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} |
356 | 0 | } |
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|
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protected boolean isErrorPayload(MuleMessage message) |
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{ |
360 | 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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{ |
365 | 0 | throw e; |
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} |
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|
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} |