gwt在服務器端加載生成的類

Question

我有自定義類生成器。 在這個生成器中，我創建了兩個類

public class WsRpcServerGenerator extends Generator{
   @Override
   public String generate(TreeLogger logger, GeneratorContext context, String typeName) throws UnableToCompleteException {
      JClassType classType;
      try {
         classType = context.getTypeOracle().getType(typeName);
         SourceWriter src;
         try {
            // generating first file xxxAsync for client
            src = generateMethod( classType, context, logger);
            // generating second class for server side
            SourceWriter src2 = generateMethodArgs( classType, context, logger);
         if (src2!=null)
            src2.commit(logger);
         } catch (Exception e) {}
         // returning first class for client
         if (src == null)return typeName + "__AsyncWsRpcGenerated";
            src.commit(logger);         
         return typeName + "__AsyncWsRpcGenerated";
      } catch (NotFoundException e) {}
   }
}

我用

TestObject obj = GWT.create(TestObject.class);

這是工作。 gwt生成了兩個文件。 首先加載到客戶端。

但是我不知道如何在服務器端加載第二個文件。 如果我在Eclipse中刷新可見性生成類的項目，則用test=Class.forName("com.xxx.TestObject__ArgsGenerated");加載類test=Class.forName("com.xxx.TestObject__ArgsGenerated"); 。 但是我不會刷新項目，它的庫。

謝謝

Answer 1

我正在尋找什么默認gwtRpc，gwtRpc保存有關rpc序列化策略的信息，我將保存到com.xxx.TestObject__ArgsGenerated類的內容保存到純文本文件到Web目錄。 所以我必須走這條路。 在生成器中，我必須創建資源文件，並在其中放置序列化策略。

public class WsRpcServerGenerator extends Generator{
   @Override
   public String generate(TreeLogger logger, GeneratorContext context, String typeName) throws UnableToCompleteException {
      JClassType classType;
      try {
         classType = context.getTypeOracle().getType(typeName);
         SourceWriter src;
         try {
            // generating first file xxxAsync for client
            src = generateMethod( classType, context, logger);
            // generating file to war directorz
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(baos, SerializationPolicyLoader.SERIALIZATION_POLICY_FILE_ENCODING);
            TypeOracle oracle = context.getTypeOracle();
            PrintWriter pw = new PrintWriter(osw);
            // generate content here
            pw.close();
            byte[] serializationPolicyFileContents = baos.toByteArray();
            String serializationPolicyName = Util.computeStrongName(serializationPolicyFileContents);
            String serializationPolicyFileName = SerializationPolicyLoader.getSerializationPolicyFileName(serializationPolicyName);
            OutputStream os = context.tryCreateResource(logger, serializationPolicyFileName);
            if (os != null) {
                 os.write(serializationPolicyFileContents);
                 GeneratedResource resource = ctx.commitResource(logger, os);
            }    
         // returning first class for client
         if (src == null)return typeName + "__AsyncWsRpcGenerated";
            src.commit(logger);         
         return typeName + "__AsyncWsRpcGenerated";
      } catch (NotFoundException e | IOException e) {}
   }
}

服務器端讀取策略

HttpServlet servlet;
String modulename; // sended from client GWT.getModuleBaseURL() reolacing host
Sending serialiyationpolicyid; // from generated xxxAsync
// Open the RPC resource file and read its contents.
InputStream is=servlet.getServletContext().getResourceAsStream(modulename+"/"+serialiyationpolicyid+".rpc");
// read policy

Answer 2

我找到了解決方案，並讓原始gwt ClassSourceFileComposerFactory啟發了自己的編譯器

發電機源

用法

DynamicJavaFileObject composer = new DynamicJavaFileObject("com.xxx","ClassName");

composer.setSuperclass("superclass");
composer.addImport(GWT.class.getCanonicalName());

SourceWriter writer = composer.getSourceWriter();

writer.println("public String test(){return \"test\"}");

writer.commit(logger);

現在我可以在服務器端找到類

Class.forName("com.xxx.ClassName");