private static synchronized JavacServerClient ensureJavacServerLaunched(CompileContext context)
throws Exception {
final ExternalJavacDescriptor descriptor = ExternalJavacDescriptor.KEY.get(context);
if (descriptor != null) {
return descriptor.client;
}
// start server here
final int port = findFreePort();
final int heapSize = getJavacServerHeapSize(context);
// defaulting to the same jdk that used to run the build process
String javaHome = SystemProperties.getJavaHome();
int javaVersion = convertToNumber(SystemProperties.getJavaVersion());
for (JpsSdk<?> sdk : context.getProjectDescriptor().getProjectJavaSdks()) {
final String version = sdk.getVersionString();
final int ver = convertToNumber(version);
if (ver > javaVersion) {
javaVersion = ver;
javaHome = sdk.getHomePath();
}
}
final BaseOSProcessHandler processHandler =
JavacServerBootstrap.launchJavacServer(
javaHome, heapSize, port, Utils.getSystemRoot(), getCompilationVMOptions(context));
final JavacServerClient client = new JavacServerClient();
try {
client.connect("127.0.0.1", port);
} catch (Throwable ex) {
processHandler.destroyProcess();
throw new Exception("Failed to connect to external javac process: ", ex);
}
ExternalJavacDescriptor.KEY.set(context, new ExternalJavacDescriptor(processHandler, client));
return client;
}
