问题
I have written my own scanner to go through my JAX-RS resources and print out the method names and paths using jersey-server-1.18.1. The problem is when I migrate my same code to 2.16 (changing the package names from com.sun.* to org.glassfish.*), It just won't work.
Digging deep I found that those required jersey-server classes are no long public. Anyone knows the reason why? And how can I migrate my code below from 1.x to 2.x ? There is literally no documentation on this migration.
All help appreciated! Below is the code with 1.x
import com.wordnik.swagger.annotations.ApiOperation;
import com.sun.jersey.api.model.AbstractResource;
import com.sun.jersey.api.model.AbstractResourceMethod;
import com.sun.jersey.api.model.AbstractSubResourceLocator;
import com.sun.jersey.api.model.AbstractSubResourceMethod;
import com.sun.jersey.server.impl.modelapi.annotation.IntrospectionModeller;
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author shivang
*/
public class Apiscanner {
public static void main(String[] args) {
Apiscanner runClass = new Apiscanner();
runClass.xyz();
}
public void xyz() {
AbstractResource resource = IntrospectionModeller.createResource(BaseResource.class);
String uriPrefix = resource.getPath().getValue();
abc(uriPrefix, resource);
}
public void abc(String uriPrefix, AbstractResource resource) {
for (AbstractResourceMethod srm : resource.getResourceMethods()) {
String uri = uriPrefix;
System.out.println(srm.getHttpMethod() + "\t" + uri);
}
for (AbstractSubResourceMethod srm : resource.getSubResourceMethods()) {
String uri = uriPrefix + srm.getPath().getValue();
ApiOperation op = srm.getAnnotation(ApiOperation.class);
System.out.println(srm.getHttpMethod() + "\t" + uri);
}
if (resource.getSubResourceLocators() != null && !resource.getSubResourceLocators().isEmpty()) {
for (AbstractSubResourceLocator subResourceLocator : resource.getSubResourceLocators()) {
ApiOperation op = subResourceLocator.getAnnotation(ApiOperation.class);
AbstractResource childResource = IntrospectionModeller.createResource(op.response());
String path = subResourceLocator.getPath().getValue();
String pathPrefix = uriPrefix + path;
abc(pathPrefix, childResource);
}
}
}
}
回答1:
The new APIs for Jersey 2.x, can mainly be found in the org.glassfish.jersey.server.model package.
Some equivalents I can think of:
AbstractResource== ResourceIntrospectionModeller.createResource== I believeResource.from(BaseResource.class)AbstracResourceMethod== ResourceMethodresource.getSubResourceMethods()==getChildResources(), which actually just returns aList<Resource>AbstractSubResourceLocator== Doesn't seem to exist. We would simply check the above child resource to see if it is a locatorfor (Resource childResource: resource.getChildResources()) { if (childResource.getResourceLocator() != null) { ResourceMethod method = childResource.getResourceLocator(); Class locatorType = method.getInvocable().getRawResponseType(); } }
Here's what I was able to come up with, to kind of match what you got.
import com.wordnik.swagger.annotations.ApiOperation;
import org.glassfish.jersey.server.model.Resource;
import org.glassfish.jersey.server.model.ResourceMethod;
public class ApiScanner {
public static void main(String[] args) {
ApiScanner scanner = new ApiScanner();
scanner.xyz();
}
public void xyz() {
Resource resource = Resource.from(BaseResource.class);
abc(resource.getPath(), resource);
}
public void abc(String uriPrefix, Resource resource) {
for (ResourceMethod resourceMethod: resource.getResourceMethods()) {
String uri = uriPrefix;
System.out.println("-- Resource Method --");
System.out.println(resourceMethod.getHttpMethod() + "\t" + uri);
ApiOperation api = resourceMethod.getInvocable().getDefinitionMethod()
.getAnnotation(ApiOperation.class);
}
for (Resource childResource: resource.getChildResources()) {
System.out.println("-- Child Resource --");
System.out.println(childResource.getPath() + "\t" + childResource.getName());
if (childResource.getResourceLocator() != null) {
System.out.println("-- Sub-Resource Locator --");
ResourceMethod method = childResource.getResourceLocator();
Class locatorType = method.getInvocable().getRawResponseType();
System.out.println(locatorType);
Resource subResource = Resource.from(locatorType);
abc(childResource.getPath(), subResource);
}
}
}
}
回答2:
OK. So I was able to get it to work almost at the same time as @peeskillet provided the answer. I will add just a different flavor of the answer in case people want to reuse the code:
import java.util.ArrayList;
import java.util.List;
import org.glassfish.jersey.server.model.Resource;
import org.glassfish.jersey.server.model.ResourceMethod;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author shivang
*/
public class JerseyResourceScanner {
public static void main(String[] args) {
JerseyResourceScanner runClass = new JerseyResourceScanner();
runClass.scan(BaseResource.class);
}
public void scan(Class baseClass) {
Resource resource = Resource.builder(baseClass).build();
String uriPrefix = "";
process(uriPrefix, resource);
}
private void process(String uriPrefix, Resource resource) {
String pathPrefix = uriPrefix;
List<Resource> resources = new ArrayList<>();
resources.addAll(resource.getChildResources());
if (resource.getPath() != null) {
pathPrefix = pathPrefix + resource.getPath();
}
for (ResourceMethod method : resource.getAllMethods()) {
if (method.getType().equals(ResourceMethod.JaxrsType.SUB_RESOURCE_LOCATOR)) {
resources.add(
Resource.from(resource.getResourceLocator()
.getInvocable().getDefinitionMethod().getReturnType()));
}
else {
System.out.println(method.getHttpMethod() + "\t" + pathPrefix);
}
}
for (Resource childResource : resources) {
process(pathPrefix, childResource);
}
}
}
来源：https://stackoverflow.com/questions/29654883/introspecting-jersey-resource-model-jersey-2-x