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Merge pull request #249 from Dog-Lee/master
@JsonRpcService support placeholder
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src/main/java/com/googlecode/jsonrpc4j/spring/AutoJsonRpcClientProxyCreator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,124 +1,134 @@ | ||
| package com.googlecode.jsonrpc4j.spring; | ||
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| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.googlecode.jsonrpc4j.JsonRpcService; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.springframework.beans.factory.config.BeanFactoryPostProcessor; | ||
| import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; | ||
| import org.springframework.beans.factory.support.BeanDefinitionBuilder; | ||
| import org.springframework.beans.factory.support.DefaultListableBeanFactory; | ||
| import org.springframework.context.ApplicationContext; | ||
| import org.springframework.context.ApplicationContextAware; | ||
| import org.springframework.core.io.Resource; | ||
| import org.springframework.core.type.AnnotationMetadata; | ||
| import org.springframework.core.type.ClassMetadata; | ||
| import org.springframework.core.type.classreading.MetadataReader; | ||
| import org.springframework.core.type.classreading.SimpleMetadataReaderFactory; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.MalformedURLException; | ||
| import java.net.URL; | ||
|
|
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| import static java.lang.String.format; | ||
| import static org.springframework.util.ClassUtils.convertClassNameToResourcePath; | ||
| import static org.springframework.util.ResourceUtils.CLASSPATH_URL_PREFIX; | ||
|
|
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| /** | ||
| * Auto-creates proxies for service interfaces annotated with {@link JsonRpcService}. | ||
| */ | ||
| @SuppressWarnings("unused") | ||
| public class AutoJsonRpcClientProxyCreator implements BeanFactoryPostProcessor, ApplicationContextAware { | ||
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| private static final Logger logger = LoggerFactory.getLogger(AutoJsonRpcClientProxyCreator.class); | ||
| private ApplicationContext applicationContext; | ||
| private String scanPackage; | ||
| private URL baseUrl; | ||
| private ObjectMapper objectMapper; | ||
| private String contentType; | ||
|
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| @Override | ||
| public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) { | ||
| SimpleMetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory(applicationContext); | ||
| DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) beanFactory; | ||
| String resolvedPath = resolvePackageToScan(); | ||
| logger.debug("Scanning '{}' for JSON-RPC service interfaces.", resolvedPath); | ||
| try { | ||
| for (Resource resource : applicationContext.getResources(resolvedPath)) { | ||
| if (resource.isReadable()) { | ||
| MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(resource); | ||
| ClassMetadata classMetadata = metadataReader.getClassMetadata(); | ||
| AnnotationMetadata annotationMetadata = metadataReader.getAnnotationMetadata(); | ||
| String jsonRpcPathAnnotation = JsonRpcService.class.getName(); | ||
| if (annotationMetadata.isAnnotated(jsonRpcPathAnnotation)) { | ||
| String className = classMetadata.getClassName(); | ||
| String path = (String) annotationMetadata.getAnnotationAttributes(jsonRpcPathAnnotation).get("value"); | ||
| logger.debug("Found JSON-RPC service to proxy [{}] on path '{}'.", className, path); | ||
| registerJsonProxyBean(defaultListableBeanFactory, className, path); | ||
| } | ||
| } | ||
| } | ||
| } catch (IOException e) { | ||
| throw new IllegalStateException(format("Cannot scan package '%s' for classes.", resolvedPath), e); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Converts the scanPackage to something that the resource loader can handleRequest. | ||
| */ | ||
| private String resolvePackageToScan() { | ||
| return CLASSPATH_URL_PREFIX + convertClassNameToResourcePath(scanPackage) + "/**/*.class"; | ||
| } | ||
|
|
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| /** | ||
| * Registers a new proxy bean with the bean factory. | ||
| */ | ||
| private void registerJsonProxyBean(DefaultListableBeanFactory defaultListableBeanFactory, String className, String path) { | ||
| BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder | ||
| .rootBeanDefinition(JsonProxyFactoryBean.class) | ||
| .addPropertyValue("serviceUrl", appendBasePath(path)) | ||
| .addPropertyValue("serviceInterface", className); | ||
|
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| if (objectMapper != null) { | ||
| beanDefinitionBuilder.addPropertyValue("objectMapper", objectMapper); | ||
| } | ||
|
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| if (contentType != null) { | ||
| beanDefinitionBuilder.addPropertyValue("contentType", contentType); | ||
| } | ||
|
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| defaultListableBeanFactory.registerBeanDefinition(className + "-clientProxy", beanDefinitionBuilder.getBeanDefinition()); | ||
| } | ||
|
|
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| /** | ||
| * Appends the base path to the path found in the interface. | ||
| */ | ||
| private String appendBasePath(String path) { | ||
| try { | ||
| return new URL(baseUrl, path).toString(); | ||
| } catch (MalformedURLException e) { | ||
| throw new IllegalArgumentException(format("Cannot combine URLs '%s' and '%s' to valid URL.", baseUrl, path), e); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void setApplicationContext(ApplicationContext applicationContext) { | ||
| this.applicationContext = applicationContext; | ||
| } | ||
|
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| public void setBaseUrl(URL baseUrl) { | ||
| this.baseUrl = baseUrl; | ||
| } | ||
|
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| public void setScanPackage(String scanPackage) { | ||
| this.scanPackage = scanPackage; | ||
| } | ||
|
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| public void setObjectMapper(ObjectMapper objectMapper) { | ||
| this.objectMapper = objectMapper; | ||
| } | ||
|
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| public void setContentType(String contextType) { | ||
| this.contentType = contextType; | ||
| } | ||
| } | ||
| package com.googlecode.jsonrpc4j.spring; | ||
|
|
||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.googlecode.jsonrpc4j.JsonRpcService; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.springframework.beans.factory.config.BeanFactoryPostProcessor; | ||
| import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; | ||
| import org.springframework.beans.factory.support.BeanDefinitionBuilder; | ||
| import org.springframework.beans.factory.support.DefaultListableBeanFactory; | ||
| import org.springframework.context.ApplicationContext; | ||
| import org.springframework.context.ApplicationContextAware; | ||
| import org.springframework.context.EnvironmentAware; | ||
| import org.springframework.core.env.Environment; | ||
| import org.springframework.core.io.Resource; | ||
| import org.springframework.core.type.AnnotationMetadata; | ||
| import org.springframework.core.type.ClassMetadata; | ||
| import org.springframework.core.type.classreading.MetadataReader; | ||
| import org.springframework.core.type.classreading.SimpleMetadataReaderFactory; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.MalformedURLException; | ||
| import java.net.URL; | ||
|
|
||
| import static java.lang.String.format; | ||
| import static org.springframework.util.ClassUtils.convertClassNameToResourcePath; | ||
| import static org.springframework.util.ResourceUtils.CLASSPATH_URL_PREFIX; | ||
|
|
||
| /** | ||
| * Auto-creates proxies for service interfaces annotated with {@link JsonRpcService}. | ||
| */ | ||
| @SuppressWarnings("unused") | ||
| public class AutoJsonRpcClientProxyCreator implements BeanFactoryPostProcessor, ApplicationContextAware, EnvironmentAware { | ||
|
|
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| private static final Logger logger = LoggerFactory.getLogger(AutoJsonRpcClientProxyCreator.class); | ||
| private ApplicationContext applicationContext; | ||
| private Environment environment; | ||
| private String scanPackage; | ||
| private URL baseUrl; | ||
| private ObjectMapper objectMapper; | ||
| private String contentType; | ||
|
|
||
| @Override | ||
| public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) { | ||
| SimpleMetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory(applicationContext); | ||
| DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) beanFactory; | ||
| String resolvedPath = resolvePackageToScan(); | ||
| logger.debug("Scanning '{}' for JSON-RPC service interfaces.", resolvedPath); | ||
| try { | ||
| for (Resource resource : applicationContext.getResources(resolvedPath)) { | ||
| if (resource.isReadable()) { | ||
| MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(resource); | ||
| ClassMetadata classMetadata = metadataReader.getClassMetadata(); | ||
| AnnotationMetadata annotationMetadata = metadataReader.getAnnotationMetadata(); | ||
| String jsonRpcPathAnnotation = JsonRpcService.class.getName(); | ||
| if (annotationMetadata.isAnnotated(jsonRpcPathAnnotation)) { | ||
| String className = classMetadata.getClassName(); | ||
| String path = (String) annotationMetadata.getAnnotationAttributes(jsonRpcPathAnnotation).get("value"); | ||
| path = this.environment.resolvePlaceholders(path); | ||
| logger.debug("Found JSON-RPC service to proxy [{}] on path '{}'.", className, path); | ||
| registerJsonProxyBean(defaultListableBeanFactory, className, path); | ||
| } | ||
| } | ||
| } | ||
| } catch (IOException e) { | ||
| throw new IllegalStateException(format("Cannot scan package '%s' for classes.", resolvedPath), e); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Converts the scanPackage to something that the resource loader can handleRequest. | ||
| */ | ||
| private String resolvePackageToScan() { | ||
| return CLASSPATH_URL_PREFIX + convertClassNameToResourcePath(scanPackage) + "/**/*.class"; | ||
| } | ||
|
|
||
| /** | ||
| * Registers a new proxy bean with the bean factory. | ||
| */ | ||
| private void registerJsonProxyBean(DefaultListableBeanFactory defaultListableBeanFactory, String className, String path) { | ||
| BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder | ||
| .rootBeanDefinition(JsonProxyFactoryBean.class) | ||
| .addPropertyValue("serviceUrl", appendBasePath(path)) | ||
| .addPropertyValue("serviceInterface", className); | ||
|
|
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| if (objectMapper != null) { | ||
| beanDefinitionBuilder.addPropertyValue("objectMapper", objectMapper); | ||
| } | ||
|
|
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| if (contentType != null) { | ||
| beanDefinitionBuilder.addPropertyValue("contentType", contentType); | ||
| } | ||
|
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| defaultListableBeanFactory.registerBeanDefinition(className + "-clientProxy", beanDefinitionBuilder.getBeanDefinition()); | ||
| } | ||
|
|
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| /** | ||
| * Appends the base path to the path found in the interface. | ||
| */ | ||
| private String appendBasePath(String path) { | ||
| try { | ||
| return new URL(baseUrl, path).toString(); | ||
| } catch (MalformedURLException e) { | ||
| throw new IllegalArgumentException(format("Cannot combine URLs '%s' and '%s' to valid URL.", baseUrl, path), e); | ||
| } | ||
| } | ||
|
|
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| @Override | ||
| public void setApplicationContext(ApplicationContext applicationContext) { | ||
| this.applicationContext = applicationContext; | ||
| } | ||
|
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|
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| @Override | ||
| public void setEnvironment(Environment environment) { | ||
| this.environment = environment; | ||
| } | ||
|
|
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| public void setBaseUrl(URL baseUrl) { | ||
| this.baseUrl = baseUrl; | ||
| } | ||
|
|
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| public void setScanPackage(String scanPackage) { | ||
| this.scanPackage = scanPackage; | ||
| } | ||
|
|
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| public void setObjectMapper(ObjectMapper objectMapper) { | ||
| this.objectMapper = objectMapper; | ||
| } | ||
|
|
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| public void setContentType(String contextType) { | ||
| this.contentType = contextType; | ||
| } | ||
| } |