start modularizing cbt into libraries

this extracts certain parts of cbt into stand-alone libraries, which can
be published to maven and used outside of cbt.

This also adds scalariform for these parts of the code.

This slows down cbt’s own build a lot because of the number of projects
involved! So we’ll follow this by a bunch of performance tweak commits.

1 files changed, 0 insertions, 83 deletions

diff --git a/nailgun_launcher/TrapSecurityManager.java b/nailgun_launcher/TrapSecurityManager.java
deleted file mode 100644
index be59671..0000000
--- a/nailgun_launcher/TrapSecurityManager.java
+++ /dev/null
@@ -1,83 +0,0 @@
-package cbt;
-import java.security.*;
-/*
-When enabled, this SecurityManager turns System.exit(...) calls into exceptions that can be caught and handled.
-Installing a SecurityManager is a global side-effect and thus needs extra care in a persistent
-background process like CBT's. The current approach is install it once during JVM-startup.
-When disabled this delegates to the SecurityManager installed before if any, which
-would be Nailgun's if running on Nailgun. If we do not delegate to Nailgun, it seems we
-could in some cases kill the server process
-*/
-public class TrapSecurityManager extends ProxySecurityManager{
-  public static ThreadLocal<Boolean> trapExitCode(){
-    // storing the flag in the installed security manager
-    // instead of e.g. a static member is necessary because
-    // we run multiple versions of CBT with multiple TrapSecurityManager classes
-    // but we need to affect the installed one
-    SecurityManager sm = System.getSecurityManager();
-    if(sm instanceof TrapSecurityManager){
-      return ((TrapSecurityManager) sm)._trapExitCode;
-    } else {
-      try{
-        @SuppressWarnings("unchecked")
-        ThreadLocal<Boolean> res =
-          (ThreadLocal<Boolean>) sm.getClass().getMethod("trapExitCode").invoke(null);
-        return res;
-      } catch(Exception e) {
-        throw new RuntimeException(e);
-      }
-    }
-  }
-
-  private final ThreadLocal<Boolean> _trapExitCode =
-    new ThreadLocal<Boolean>() {
-      @Override protected Boolean initialValue() {
-        return false;
-      }
-    };
-
-  public TrapSecurityManager(){
-    super(NailgunLauncher.initialSecurityManager);
-  }
-
-  public void checkPermission( Permission permission ){
-    /*
-    NOTE: is it actually ok, to just make these empty?
-    Calling .super leads to ClassNotFound exteption for a lambda.
-    Calling to the previous SecurityManager leads to a stack overflow
-    */
-    if(!TrapSecurityManager.trapExitCode().get()){
-      super.checkPermission(permission);
-    }
-  }
-  public void checkPermission( Permission permission, Object context ){
-    /* Does this methods need to be overidden? */
-    if(!TrapSecurityManager.trapExitCode().get()){
-      super.checkPermission(permission, context);
-    }
-  }
-
-  private static final String prefix = "[TrappedExit] ";
-
-  @Override
-  public void checkExit( int status ){
-    if(TrapSecurityManager.trapExitCode().get()){
-      // using a RuntimeException and a prefix here instead of a custom
-      // exception type because this is thrown by the installed TrapSecurityManager
-      // but other versions of cbt need to be able to catch it, that do not have access
-      // to that version of the TrapSecurityManager class
-      throw new RuntimeException(prefix+status);
-    }
-    super.checkExit(status);
-  }
-
-  public static boolean isTrappedExit( Throwable t ){
-    return t instanceof RuntimeException && t.getMessage() != null && t.getMessage().startsWith(prefix);
-  }
-
-  public static int exitCode( Throwable t ){
-    assert(isTrappedExit(t));
-    return Integer.parseInt( t.getMessage().substring(prefix.length()) );
-  }
-
-}