Java Code Examples for org.eclipse.lsp4j.jsonrpc.CompletableFutures#computeAsync()

/**
 * Returns the completable future which loads the model. The process of parse od
 * the model is stopped as soon as possible when text content changed.
 * 
 * @return the completable future which loads the model.
 */
public CompletableFuture<T> getModel() {
	if (model == null) {
		int version = super.getVersion();
		model = CompletableFutures.computeAsync((requestCancelChecker) -> {
			long start = System.currentTimeMillis();
			try {
				LOGGER.fine("Start parsing of model with version '" + version);
				// Stop of parse process can be done when completable future is canceled or when
				// version of document changes
				MultiCancelChecker cancelChecker = new MultiCancelChecker(requestCancelChecker,
						new TextDocumentVersionChecker(this, version));
				// parse the model
				return parse.apply(this, cancelChecker);
			} catch (CancellationException e) {
				LOGGER.fine("Stop parsing parsing of model with version '" + version + "' in "
						+ (System.currentTimeMillis() - start) + "ms");
				throw e;
			} finally {
				LOGGER.fine("End parse of model with version '" + version + "' in "
						+ (System.currentTimeMillis() - start) + "ms");
			}
		});
	}
	return model;
}
 

/**
 * Renames a symbol at the specified document position.
 */
@Override
public CompletableFuture<WorkspaceEdit> rename(RenameParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            RenameProvider provider = new RenameProvider(workspaceFolderManager, fileTracker);
            WorkspaceEdit result = provider.rename(params, cancelToken);
            if(result == null)
            {
                if (languageClient != null)
                {
                    MessageParams message = new MessageParams();
                    message.setType(MessageType.Info);
                    message.setMessage("You cannot rename this element.");
                    languageClient.showMessage(message);
                }
                return new WorkspaceEdit(new HashMap<>());
            }
            return result;
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Can be used to "quick fix" an error or warning.
 */
@Override
public CompletableFuture<List<Either<Command, CodeAction>>> codeAction(CodeActionParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            CodeActionProvider provider = new CodeActionProvider(workspaceFolderManager, fileTracker);
            return provider.codeAction(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Returns a list of all items to display in the completion list at a
 * specific position in a document. Called automatically by VSCode as the
 * user types, and may not necessarily be triggered only on "." or ":".
 */
@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            CompletionProvider provider = new CompletionProvider(workspaceFolderManager,
                    fileTracker, completionSupportsSnippets, frameworkSDKIsRoyale);
            return provider.completion(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Returns information to display in a tooltip when the mouse hovers over
 * something in a text document.
 */
@Override
public CompletableFuture<Hover> hover(HoverParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            HoverProvider provider = new HoverProvider(workspaceFolderManager, fileTracker);
            return provider.hover(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Displays a function's parameters, including which one is currently
 * active. Called automatically by VSCode any time that the user types "(",
 * so be sure to check that a function call is actually happening at the
 * current position.
 */
@Override
public CompletableFuture<SignatureHelp> signatureHelp(SignatureHelpParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            SignatureHelpProvider provider = new SignatureHelpProvider(workspaceFolderManager, fileTracker);
            return provider.signatureHelp(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Finds where the definition referenced at the current position in a text
 * document is defined.
 */
@Override
public CompletableFuture<Either<List<? extends Location>, List<? extends LocationLink>>> definition(DefinitionParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            DefinitionProvider provider = new DefinitionProvider(workspaceFolderManager, fileTracker);
            return provider.definition(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Finds where the type of the definition referenced at the current position
 * in a text document is defined.
 */
@Override
public CompletableFuture<Either<List<? extends Location>, List<? extends LocationLink>>> typeDefinition(TypeDefinitionParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            TypeDefinitionProvider provider = new TypeDefinitionProvider(workspaceFolderManager, fileTracker);
            return provider.typeDefinition(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Finds all implemenations of an interface.
 */
@Override
public CompletableFuture<Either<List<? extends Location>, List<? extends LocationLink>>> implementation(ImplementationParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            ImplementationProvider provider = new ImplementationProvider(workspaceFolderManager, fileTracker);
            return provider.implementation(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Finds all references of the definition referenced at the current position
 * in a text document. Does not necessarily get called where a definition is
 * defined, but may be at one of the references.
 */
@Override
public CompletableFuture<List<? extends Location>> references(ReferenceParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            ReferencesProvider provider = new ReferencesProvider(workspaceFolderManager, fileTracker);
            return provider.references(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Searches by name for a symbol in the workspace.
 */
@Override
public CompletableFuture<List<? extends SymbolInformation>> symbol(WorkspaceSymbolParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            WorkspaceSymbolProvider provider = new WorkspaceSymbolProvider(workspaceFolderManager);
            return provider.workspaceSymbol(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

/**
 * Searches by name for a symbol in a specific document (not the whole
 * workspace)
 */
@Override
public CompletableFuture<List<Either<SymbolInformation, DocumentSymbol>>> documentSymbol(DocumentSymbolParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }
        
        compilerWorkspace.startBuilding();
        try
        {
            boolean hierarchicalDocumentSymbolSupport = false;
            try
            {
                hierarchicalDocumentSymbolSupport = clientCapabilities.getTextDocument().getDocumentSymbol().getHierarchicalDocumentSymbolSupport();
            }
            catch(NullPointerException e)
            {
                //ignore
            }
            DocumentSymbolProvider provider = new DocumentSymbolProvider(workspaceFolderManager, hierarchicalDocumentSymbolSupport);
            return provider.documentSymbol(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

@Test
public void testCancellationResponse() throws Exception {
	// create client messages
	String requestMessage = "{\"jsonrpc\": \"2.0\",\n"
			+ "\"id\": \"1\",\n" 
			+ "\"method\": \"askServer\",\n" 
			+ "\"params\": { \"value\": \"bar\" }\n"
			+ "}";
	String cancellationMessage = "{\"jsonrpc\": \"2.0\",\n"
			+ "\"method\": \"$/cancelRequest\",\n" 
			+ "\"params\": { \"id\": 1 }\n"
			+ "}";
	String clientMessages = getHeader(requestMessage.getBytes().length) + requestMessage
			+ getHeader(cancellationMessage.getBytes().length) + cancellationMessage;
	
	// create server side
	ByteArrayInputStream in = new ByteArrayInputStream(clientMessages.getBytes());
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	MyServer server = new MyServer() {
		@Override
		public CompletableFuture<MyParam> askServer(MyParam param) {
			return CompletableFutures.computeAsync(cancelToken -> {
				try {
					long startTime = System.currentTimeMillis();
					do {
						cancelToken.checkCanceled();
						Thread.sleep(50);
					} while (System.currentTimeMillis() - startTime < TIMEOUT);
				} catch (InterruptedException e) {
					Assert.fail("Thread was interrupted unexpectedly.");
				}
				return param;
			});
		}
	};
	Launcher<MyClient> serverSideLauncher = Launcher.createLauncher(server, MyClient.class, in, out);
	serverSideLauncher.startListening().get(TIMEOUT, TimeUnit.MILLISECONDS);
	
	Assert.assertEquals("Content-Length: 132" + CRLF + CRLF
			+ "{\"jsonrpc\":\"2.0\",\"id\":\"1\",\"error\":{\"code\":-32800,\"message\":\"The request (id: 1, method: \\u0027askServer\\u0027) has been cancelled\"}}",
			out.toString());
}
 

@Test
public void testCancellationResponse() throws Exception {
	// create client messages
	String requestMessage = "{\"type\":\"request\","
			+ "\"seq\":1,\n"
			+ "\"command\":\"askServer\",\n"
			+ "\"arguments\": { value: \"bar\" }\n"
			+ "}";
	String cancellationMessage = "{\"type\":\"event\","
			+ "\"event\":\"$/cancelRequest\",\n"
			+ "\"body\": { id: 1 }\n"
			+ "}";
	String clientMessages = getHeader(requestMessage.getBytes().length) + requestMessage
			+ getHeader(cancellationMessage.getBytes().length) + cancellationMessage;

	// create server side
	ByteArrayInputStream in = new ByteArrayInputStream(clientMessages.getBytes());
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	MyServer server = new MyServer() {
		@Override
		public CompletableFuture<MyParam> askServer(MyParam param) {
			return CompletableFutures.computeAsync(cancelToken -> {
				try {
					long startTime = System.currentTimeMillis();
					do {
						cancelToken.checkCanceled();
						Thread.sleep(50);
					} while (System.currentTimeMillis() - startTime < TIMEOUT);
				} catch (InterruptedException e) {
					Assert.fail("Thread was interrupted unexpectedly.");
				}
				return param;
			});
		}
	};
	Launcher<MyClient> serverSideLauncher = DebugLauncher.createLauncher(server, MyClient.class, in, out);
	serverSideLauncher.startListening().get(TIMEOUT, TimeUnit.MILLISECONDS);

	Assert.assertEquals("Content-Length: 163\r\n\r\n" +
			"{\"type\":\"response\",\"seq\":1,\"request_seq\":1,\"command\":\"askServer\",\"success\":false,\"message\":\"The request (id: 1, method: \\u0027askServer\\u0027) has been cancelled\"}",
			out.toString());
}
 

private CompletableFuture<Object> executeAddMXMLNamespaceCommand(ExecuteCommandParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        compilerWorkspace.startBuilding();
        try
        {
            cancelToken.checkCanceled();
            List<Object> args = params.getArguments();
            String nsPrefix = ((JsonPrimitive) args.get(0)).getAsString();
            String nsUri = ((JsonPrimitive) args.get(1)).getAsString();
            String uri = ((JsonPrimitive) args.get(2)).getAsString();
            int startIndex = ((JsonPrimitive) args.get(3)).getAsInt();
            int endIndex = ((JsonPrimitive) args.get(4)).getAsInt();
            if(nsPrefix == null || nsUri == null)
            {
                return new Object();
            }
            Path pathForImport = LanguageServerCompilerUtils.getPathFromLanguageServerURI(uri);
            if(pathForImport == null)
            {
                return new Object();
            }
            String text = fileTracker.getText(pathForImport);
            if(text == null)
            {
                return new Object();
            }
            WorkspaceEdit workspaceEdit = CodeActionsUtils.createWorkspaceEditForAddMXMLNamespace(nsPrefix, nsUri, text, uri, startIndex, endIndex);
            if(workspaceEdit == null)
            {
                //no edit required
                return new Object();
            }

            ApplyWorkspaceEditParams editParams = new ApplyWorkspaceEditParams();
            editParams.setEdit(workspaceEdit);

            languageClient.applyEdit(editParams);
            return new Object();
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

private CompletableFuture<Object> executeAddImportCommand(ExecuteCommandParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        compilerWorkspace.startBuilding();
        try
        {
            cancelToken.checkCanceled();
            List<Object> args = params.getArguments();
            String qualifiedName = ((JsonPrimitive) args.get(0)).getAsString();
            String uri = ((JsonPrimitive) args.get(1)).getAsString();
            int line = ((JsonPrimitive) args.get(2)).getAsInt();
            int character = ((JsonPrimitive) args.get(3)).getAsInt();
            if(qualifiedName == null)
            {
                return new Object();
            }
            Path pathForImport = LanguageServerCompilerUtils.getPathFromLanguageServerURI(uri);
            if(pathForImport == null)
            {
                return new Object();
            }
            WorkspaceFolderData folderData = workspaceFolderManager.getWorkspaceFolderDataForSourceFile(pathForImport);
            if(folderData == null || folderData.project == null)
            {
                return new Object();
            }
            String text = fileTracker.getText(pathForImport);
            if(text == null)
            {
                return new Object();
            }
            int currentOffset = LanguageServerCompilerUtils.getOffsetFromPosition(new StringReader(text), new Position(line, character));
            ImportRange importRange = null;
            if(uri.endsWith(FILE_EXTENSION_MXML))
            {
                MXMLData mxmlData = workspaceFolderManager.getMXMLDataForPath(pathForImport, folderData);
                IMXMLTagData offsetTag = MXMLDataUtils.getOffsetMXMLTag(mxmlData, currentOffset);
                importRange = ImportRange.fromOffsetTag(offsetTag, currentOffset);
            }
            else
            {
                IASNode offsetNode = workspaceFolderManager.getOffsetNode(pathForImport, currentOffset, folderData);
                importRange = ImportRange.fromOffsetNode(offsetNode);
            }
            WorkspaceEdit workspaceEdit = CodeActionsUtils.createWorkspaceEditForAddImport(
                qualifiedName, text, uri, importRange);
            if(workspaceEdit == null)
            {
                //no edit required
                return new Object();
            }

            ApplyWorkspaceEditParams editParams = new ApplyWorkspaceEditParams();
            editParams.setEdit(workspaceEdit);

            languageClient.applyEdit(editParams);
            return new Object();
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

protected <R> CompletableFuture<R> computeAsync(Function<IProgressMonitor, R> code) {
	return CompletableFutures.computeAsync(cc -> code.apply(toMonitor(cc)));
}
 

private <R> CompletableFuture<R> computeAsyncWithClientProgress(Function<IProgressMonitor, R> code) {
	return CompletableFutures.computeAsync((cc) -> {
		IProgressMonitor monitor = progressReporterManager.getProgressReporter(cc);
		return code.apply(monitor);
	});
}