Configurable heap size.

Author: dragos

README.md

@@ -58,23 +58,6 @@ You should use `sbt publishLocal` which publishes the server under `~/.ivy2/loca
 
 You can open code inside the `scala/` directory and use `F5` to debug the extension. This picks up the changes in the server (make sure you published it locally using `sbt publishLocal`!) and allows quick iteration.
 
-## Settings
-
-If VSCode is running behind a proxy add the following standard VSCode proxy settings (File -> Preferences -> Settings):
-
-{
-    "http.proxy": "http://host:port/"
-}
-
-This setting is translated as Coursier's vm arguments: -Dhttp.proxyHost=host -Dhttps.proxyHost=host -Dhttp.proxyPort=port -Dhttps.proxyPort=port.
-
-Log level settting:
-{
-    "scalaLanguageServer.logLevel" : "DEBUG"
-}
-
-This setting is passed to the Language Server affecting the log level on the server, possible values "DEBUG", "ERROR", "INFO", "WARN"
-
 
 # Publish
 

scala/CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## 0.2.2
 
+- Configurable heap size for the language server (default 768M instead of 4G)
 - Bumped Ensime Server to release 2.0.0
 - Bumped Ensime SBT to release 2.0.1
 - Fix for parts of #36 and #37 (Hover tooltip on local vals).

scala/README.md

@@ -27,3 +27,26 @@ The path to the Java Development Kit is searched in the following order:
 - the `JDK_HOME` environment variable
 - the `JAVA_HOME` environment variable
 - on the current system path
+
+# Configuration
+
+If VSCode is running behind a proxy add the following standard VSCode proxy settings (File -> Preferences -> Settings):
+
+```
+{
+    "http.proxy": "http://host:port/"
+}
+```
+
+This setting is translated as Coursier's vm arguments: -Dhttp.proxyHost=host -Dhttps.proxyHost=host -Dhttp.proxyPort=port -Dhttps.proxyPort=port.
+
+Language server setttings:
+
+```
+{
+    "scalaLanguageServer.logLevel" : "DEBUG"
+    "scalaLanguageServer.heapSize" : "768M"
+}
+```
+
+These settings are passed to the Language Server affecting the log level on the server, with possible values "DEBUG", "ERROR", "INFO", "WARN". The heap size used by the Scala language server, for example `512m` or `4G`, can also be configured. By default it will use 768M, which is probably insufficient for larger projects.

scala/src/extension.ts

@@ -47,10 +47,21 @@ export async function activate(context: ExtensionContext) {
   } else proxyArgs = []
   let logLevel = workspace.getConfiguration().get('scalaLanguageServer.logLevel')
   let logLevelStr = ''
-  if(logLevel != null) logLevelStr = logLevel.toString()
+  if (logLevel != null) logLevelStr = logLevel.toString()
+
+  let heapSize = workspace.getConfiguration().get('scalaLanguageServer.heapSize')
+  let heapSizeStr = '-Xmx768M'
+  if (heapSize != null) heapSizeStr = '-Xmx' + heapSize.toString()
 
   let coursierArgs = ['launch', '-r', 'https://dl.bintray.com/dhpcs/maven', '-r', 'sonatype:releases', '-J', toolsJar, 'com.github.dragos:ensime-lsp_2.12:0.2.1', '-M', 'org.github.dragos.vscode.Main'];
-  let javaArgs = proxyArgs.concat(['-Dvscode.workspace=' + workspace.rootPath,'-Dvscode.logLevel=' + logLevel, '-jar', coursierPath]).concat(coursierArgs);
+
+  let javaArgs = proxyArgs.concat([
+    heapSizeStr,
+    '-Dvscode.workspace=' + workspace.rootPath,
+    '-Dvscode.logLevel=' + logLevel,
+    '-jar', coursierPath
+  ]).concat(coursierArgs);
+
   // The debug options for the server
   let debugOptions = ['-Xdebug', '-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000,quiet=y'];