Add support for exiting immediately from a shutdown() request.

- In languageclient 7.x, the client fails to send the necessary exit()
  once a shutdown() response is received from the language server
- When client defines shouldLanguageServerExitOnShutdown as true, the
  language server will exit immediately after the shutdown request

Signed-off-by: Roland Grunberg <[email protected]>

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/XMLLanguageServer.java

@@ -226,6 +226,9 @@ private synchronized void updateSettings(Object initOptions, boolean initLogs) {
  @Override
  public CompletableFuture<Object> shutdown() {
  xmlLanguageService.dispose();
+ if (capabilityManager.getClientCapabilities().getExtendedCapabilities().shouldLanguageServerExitOnShutdown()) {
+ delayer.schedule(() -> exit(0) , 1, TimeUnit.SECONDS);
+ }
  return computeAsync(cc -> new Object());
  }
 

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/client/ExtendedClientCapabilities.java

@@ -26,6 +26,8 @@ public class ExtendedClientCapabilities {
 
  private boolean openSettingsCommandSupport;
 
+ private boolean shouldLanguageServerExitOnShutdown;
+
  public ExtendedCodeLensCapabilities getCodeLens() {
  return codeLens;
  }
@@ -75,4 +77,24 @@ public void setOpenSettingsCommandSupport(boolean openSettingsCommandSupport) {
  this.openSettingsCommandSupport = openSettingsCommandSupport;
  }
 
+ /**
+ * Sets the boolean permitting language server to exit on client
+ * shutdown() request, without waiting for client to call exit()
+ *
+ * @param shouldLanguageServerExitOnShutdown
+ */
+ public void setShouldLanguageServerExitOnShutdown(boolean shouldLanguageServerExitOnShutdown) {
+ this.shouldLanguageServerExitOnShutdown = shouldLanguageServerExitOnShutdown;
+ }
+
+ /**
+ * Returns true if the client should exit on shutdown() request and
+ * avoid waiting for an exit() request
+ *
+ * @return true if the language server should exit on shutdown() request
+ */
+ public boolean shouldLanguageServerExitOnShutdown() {
+ return shouldLanguageServerExitOnShutdown;
+ }
+
 }