/*

  * Copyright 2006-2011 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.api.bus.support;

 import java.net.URL;

 import javax.xml.namespace.QName;

 import org.apache.commons.lang.StringUtils;

 import org.apache.commons.lang.builder.EqualsBuilder;

 import org.apache.commons.lang.builder.HashCodeBuilder;

 import org.apache.commons.lang.builder.ReflectionToStringBuilder;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.config.ConfigurationException;

 import org.kuali.rice.core.api.config.CoreConfigHelper;

 import org.kuali.rice.core.api.config.property.ConfigContext;

 import org.kuali.rice.core.api.security.credentials.CredentialsType;

 import org.kuali.rice.core.util.ClassLoaderUtils;

 import org.kuali.rice.ksb.api.bus.Endpoint;

 import org.kuali.rice.ksb.api.bus.ServiceConfiguration;

 import org.kuali.rice.ksb.api.bus.ServiceDefinition;

 /**

  * The definition of a service on the service bus.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public abstract class AbstractServiceDefinition implements ServiceDefinition {

         private static final Logger LOG = Logger.getLogger(AbstractServiceDefinition.class);

         // used internally to construct the service name

         private String localServiceName;

         private String serviceNameSpaceURI;

         private Object service;

         private QName serviceName;

         private boolean queue;

         private Integer priority;

         private Integer retryAttempts;

         private Long millisToLive;

         private String messageExceptionHandler;

         private String servicePath;

         private URL endpointUrl;

         private Boolean busSecurity;

         private CredentialsType credentialsType;

         private String serviceVersion;

         private String applicationId;

         // if the service is exported from a plugin, we need to ensure it's invoked within the proper classloading context!

         private ClassLoader serviceClassLoader;

         protected AbstractServiceDefinition() {

                 this.busSecurity = Boolean.TRUE;

                 this.queue = true;

                 this.serviceClassLoader = ClassLoaderUtils.getDefaultClassLoader();

         }

         public Object getService() {

                 return this.service;

         }

         public void setService(Object service) {

                 this.service = service;

         }

         public String getLocalServiceName() {

                 return this.localServiceName;

         }

         public void setLocalServiceName(String serviceName) {

                 this.localServiceName = serviceName;

         }

         public String getMessageExceptionHandler() {

                 return this.messageExceptionHandler;

         }

         public void setMessageExceptionHandler(String messageExceptionHandler) {

                 this.messageExceptionHandler = messageExceptionHandler;

         }

         public Integer getPriority() {

                 return this.priority;

         }

         public void setPriority(Integer priority) {

                 this.priority = priority;

         }

         public boolean isQueue() {

                 return this.queue;

         }

         public void setQueue(boolean queue) {

                 this.queue = queue;

         }

         public Integer getRetryAttempts() {

                 return this.retryAttempts;

         }

         public void setRetryAttempts(Integer retryAttempts) {

                 this.retryAttempts = retryAttempts;

         }

         public QName getServiceName() {

                 if (this.serviceName == null) {

                         if (this.serviceNameSpaceURI == null) {

                             return new QName(this.applicationId, this.localServiceName);        

                         } else {

                             return new QName(this.serviceNameSpaceURI, this.localServiceName);

                         }

                 }

                 return this.serviceName;

         }

         public void setServiceName(QName serviceName) {

                 this.serviceName = serviceName;

         }

         @Override

         public URL getEndpointUrl() {

                 return this.endpointUrl;

         }

         public void setEndpointUrl(URL endpointUrl) {

                 this.endpointUrl = endpointUrl;

         }

         public void setCredentialsType(CredentialsType credentialsType) {

             this.credentialsType = credentialsType;

         }

         public CredentialsType getCredentialsType() {

             return this.credentialsType;

         }

         public String getServiceVersion() {

                 return serviceVersion;

         }

         public void setServiceVersion(String serviceVersion) {

                 this.serviceVersion = serviceVersion;

         }

         public String getApplicationId() {

                 return applicationId;

         }

         public void setApplicationId(String applicationId) {

                 this.applicationId = applicationId;

         }

         @Override

         public ClassLoader getServiceClassLoader() {

                 return this.serviceClassLoader;

         }

         public void setServiceClassLoader(ClassLoader serviceClassLoader) {

                 this.serviceClassLoader = serviceClassLoader;

         }

         @Override

         public void validate() {

                 if (this.serviceName == null && this.localServiceName == null) {

                         throw new ConfigurationException("Must give a serviceName or localServiceName");

                 }

                 if (this.applicationId == null) {

                         String applicationId = CoreConfigHelper.getApplicationId();

                         if (applicationId == null) {

                                 throw new ConfigurationException("Must have an applicationId");

                         }        

                         this.applicationId = applicationId;

                 }

                 if (this.serviceName != null && this.localServiceName == null) {

                         this.localServiceName = this.getServiceName().getLocalPart();

                 }

                 if (this.servicePath != null){

                         if (this.servicePath.endsWith("/")){

                                 this.servicePath = StringUtils.chop(servicePath);

                         }

                         if (!this.servicePath.startsWith("/")){

                                 this.servicePath = "/" + this.servicePath;

                         }

                 } else {

                         this.servicePath = "/";

                 }

                 // default to 'unspecified' service version

                 if (StringUtils.isBlank(serviceVersion)) {

                         setServiceVersion(CoreConstants.Versions.UNSPECIFIED);

                 }

                 LOG.debug("Validating service " + this.serviceName);

                 if (this.endpointUrl == null) {

                         String endPointURL = ConfigContext.getCurrentContextConfig().getEndPointUrl();

                         if (endPointURL == null) {

                                 throw new ConfigurationException("Must provide a serviceEndPoint or serviceServletURL");

                         }

                         if (! endPointURL.endsWith("/")) {

                                 endPointURL += servicePath;

                         } else {

                                 endPointURL = StringUtils.chop(endPointURL) + servicePath;

                         }

                         try {

                                 if (servicePath.equals("/")){

                                         this.endpointUrl = new URL(endPointURL + this.getServiceName().getLocalPart());

                                 } else {

                                         this.endpointUrl = new URL(endPointURL + "/" + this.getServiceName().getLocalPart());

                                 }

                         } catch (Exception e) {

                                 throw new ConfigurationException("Service Endpoint URL creation failed.", e);

                         }

                 }

                 if (this.priority == null) {

                         setPriority(5);

                 }

                 if (this.retryAttempts == null) {

                         setRetryAttempts(0);

                 }

                 if (this.millisToLive == null) {

                         setMillisToLive(new Long(-1));

                 }

         }

         @Override

         public Endpoint establishEndpoint() {

                 return BasicEndpoint.newEndpoint(configure(), getService());

         }

         protected abstract ServiceConfiguration configure();

         public String getServiceNameSpaceURI() {

                 return this.serviceNameSpaceURI;

         }

         public void setServiceNameSpaceURI(String serviceNameSpaceURI) {

                 this.serviceNameSpaceURI = serviceNameSpaceURI;

         }

         public Long getMillisToLive() {

                 return this.millisToLive;

         }

         public void setMillisToLive(Long millisToLive) {

                 this.millisToLive = millisToLive;

         }

         public Boolean getBusSecurity() {

                 return this.busSecurity;

         }

         public void setBusSecurity(Boolean busSecurity) {

                 this.busSecurity = busSecurity;

         }

         /**

          * @return the servicePath

          */

         public String getServicePath() {

                 return this.servicePath;

         }

         /**

          * @param servicePath the servicePath to set

          */

         public void setServicePath(String servicePath) {

                 this.servicePath = servicePath;

         }

         public String toString() {

             return ReflectionToStringBuilder.toString(this);

         }

         @Override

     public boolean equals(Object object) {

                 return EqualsBuilder.reflectionEquals(object, this);

     }

         @Override

     public int hashCode() {

         return HashCodeBuilder.reflectionHashCode(this);

     }

 }