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Commit 2d0cba67 authored by Sven Robertz's avatar Sven Robertz
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cleanup etc

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examples/dynamic/README
View file @ 2d0cba67
This directory contains a small example of how to generate and compile
a labcomm endpoint on the fly.
This directory contains a small example of how to generate and compile a
labcomm endpoint on the fly.
the script static.sh builds and runs a very simple static labcomm demo
the script dynamic.sh builds and runs an example where labcomm is generated and woven
togerther with user-defined handler code.
the script dynamic.sh builds and runs an example where labcomm is generated and
woven togerther with user-defined handler code.
the test.sh script builds and runs the TestLabCommGen, which illustrates the
on-the-fly compilation to RAM, reading the labcomm declarations and handlers from file
The handlers declaration (in handlers.txt) is experimental, and has the following format:
the test.sh script builds and runs the TestLabCommGen, which illustrates the
on-the-fly compilation to RAM, reading the labcomm declarations and handlers
from file
<sample name>:handler(<data type> <variable name>) {
<handler method code>
}###
where the end marker (}###) is a kludge to avoid having to parse the method body while still allowing
it to contain blocks. Thus, having the sequence "}###" in the method body breaks this. Caveat hacker!
The handlers declaration (in handlers.txt, handlers2.txt) is experimental, and has the
following format:
<sample name>:handler(<data type> <variable name>) { <handler method code> }###
where the end marker (}###) is a kludge to avoid having to parse the method
body while still allowing it to contain blocks. Thus, having the sequence
"}###" in the method body breaks this. Caveat hacker!
An example handlers declaration:
foo:handler(foo value) {
System.out.println("foo handler from handlers.txt");
test.HandlerContext ctx = (test.HandlerContext)context;
System.out.println("foo handler from handlers2.txt");
System.out.println("using context "+ctx.str);
ctx.x = value.x + 1000;
ctx.y = value.y + 1000;
ctx.z = value.z + 1000;
System.out.println(value.x);
System.out.println(value.y);
System.out.println(value.z);
......@@ -32,7 +41,18 @@ foo:handler(foo value) {
System.out.println();
}###
bar:handler(int value) {
System.out.println(value);
System.out.println("bar:"+value);
test.HandlerContext ctx = (test.HandlerContext)context;
ctx.bar = value + 1000;
}###
Note that parameters differ: the value for foo is an object but for bar it is a primitive type (int) value.
Note that parameters differ: the value for foo is an object but for bar it is a
primitive type (int) value.
The context in the example is a kludge or placeholder for tying the
user-provided handler methods to the environment they are executed in, and
allowing state to be kept between invokations. The class containing the handler
methods have an attribute, Object context, and its initialization is currently
hard coded. The permanent solution is TBD.
examples/dynamic/test/DynamicPart.java
View file @ 2d0cba67
......@@ -75,13 +75,13 @@ public class DynamicPart {
generateHandlers(srcStr, handlers);
System.out.println("*** Generated handler source:");
// System.out.println("*** Generated handler source:");
handlers.keySet();
for (String n : handlers.keySet()) {
System.out.println(n+":");
System.out.println(handlers.get(n));
}
// for (String n : handlers.keySet()) {
// System.out.println(n+":");
// System.out.println(handlers.get(n));
// }
InRAMCompiler irc = generateCode(labcommStr, handlers);
......@@ -95,12 +95,10 @@ public class DynamicPart {
public static void generateHandlers(String srcStr, HashMap<String,String> handlers) {
int pos = 0;
while(pos < srcStr.length()) {
// System.out.println("--------");
int nameEnd = srcStr.indexOf(':', pos);
if(nameEnd <0) break;
String name = srcStr.substring(pos,nameEnd);
// System.out.println("Name="+name);
pos=nameEnd+1;
String par = "";
......@@ -108,7 +106,6 @@ public class DynamicPart {
if(srcStr.startsWith(handler_decl, pos)) {
int endPar = srcStr.indexOf(')', pos);
par = srcStr.substring(pos+handler_decl.length(), endPar);
// System.out.println("param="+par);
pos = endPar+1;
} else {
System.out.println("expeced handler decl:\n"+srcStr.substring(pos));
......@@ -116,14 +113,9 @@ public class DynamicPart {
int bodyEnd = srcStr.indexOf("}###", pos); // HERE BE DRAGONS! a bit brittle
String body = srcStr.substring(pos, bodyEnd+1);
pos = bodyEnd+5;
// System.out.println("body:");
// System.out.println(body);
// System.out.println("**** generates:");
HandlerSrc s = new HandlerSrc(name, par, body);
final String genSrc = s.getSrc();
// System.out.println(genSrc);
handlers.put(name,genSrc);
}
}
......@@ -211,7 +203,7 @@ public class DynamicPart {
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Generated labcomm code:");
// System.out.println("Generated labcomm code:");
InRAMCompiler irc = new InRAMCompilerJavax("labcomm.generated", TestLabcommGen.class.getClassLoader());
......@@ -219,12 +211,12 @@ public class DynamicPart {
StringBuilder handlerMethods = new StringBuilder();
handlerClass.append("package labcomm.generated;\n");
handlerClass.append("import test.TestLabcommGen;\n");
handlerClass.append("public class "+handlerClassName+" implements ");
String handlerAttributes = "Object context;\n";
String handlerConstructor = "public "+handlerClassName+"(Object context){ this.context=context;}\n";
String handlerConstr = "public "+handlerClassName+"(){super();}\n";
String handlerConstrCtxt = "public "+handlerClassName+"(Object context){ this.context=context;}\n";
Iterator<String> i = genCode.keySet().iterator();
try {
......@@ -237,12 +229,13 @@ public class DynamicPart {
}
handlerMethods.append(handlers.get(sampleName));
handlerMethods.append("\n");
System.out.println("***"+sampleName+"\n"+src);
// System.out.println("***"+sampleName+"\n"+src);
irc.compile(sampleName, src); // while iterating, compile the labcomm generated code
}
handlerClass.append("{\n");
handlerClass.append(handlerAttributes);
handlerClass.append(handlerConstructor);
handlerClass.append(handlerConstr);
handlerClass.append(handlerConstrCtxt);
handlerClass.append(handlerMethods.toString());
handlerClass.append("}\n");
......@@ -270,55 +263,6 @@ public class DynamicPart {
return irc;
}
/** generate labcomm code and compile handlers. Version for separate handler classes
*
* @param lcAST - the AST of the labcomm declaration
* @param handlers - a map <name, source> of handlers for the types in ast
* @return an InRAMCompiler object containing the generated clases
*/
private static InRAMCompiler handleAstSeparate(Program lcAST, HashMap<String, String> handlers) {
Map<String, String> genCode = new HashMap<String, String>();
try {
lcAST.J_gen(genCode, "labcomm.generated");
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Generated labcomm code:");
InRAMCompiler irc = new InRAMCompilerJavax("labcomm.generated", null);
Iterator<String> i = genCode.keySet().iterator();
while(i.hasNext()){
final String sampleName = i.next();
final String src = genCode.get(sampleName);
System.out.println("***"+sampleName+"\n"+src);
StringBuilder sb = new StringBuilder();
sb.append("package labcomm.generated;\n");
sb.append("public class gen_"+sampleName+"Handler implements "+sampleName+".Handler {\n");
sb.append(handlers.get(sampleName));
sb.append("}\n");
System.out.println("-------------------------------------");
System.out.println(sb.toString());
try {
irc.compile(sampleName, src);
irc.compile("gen_"+sampleName+"Handler", sb.toString());
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
System.out.println("================================");
}
return irc;
}
/** test method
*/
private void decodeTest(InRAMCompiler irc, HandlerContext ctxt, String tmpFile, String... sampleNames) {
......@@ -450,82 +394,4 @@ public class DynamicPart {
e.printStackTrace();
}
}
/** test method
*/
private static void decodeTestSeparate(InRAMCompiler irc, String tmpFile, String... sampleNames) {
try {
FileInputStream in = new FileInputStream(tmpFile);
LabCommDecoderChannel dec = new LabCommDecoderChannel(in);
for (String sampleName : sampleNames) {
System.out.println("registering handler for "+sampleName);
Class sampleClass = irc.load(sampleName);
Class handlerClass = irc.load("gen_"+sampleName+"Handler");
Class handlerInterface = irc.load(sampleName+"$Handler");
Object handler = handlerClass.newInstance();
Method reg = sampleClass.getDeclaredMethod("register", LabCommDecoder.class, handlerInterface);
reg.invoke(sampleClass, dec, handler);
}
try{
System.out.println("*** decoding:");
dec.run();
} catch(EOFException e) {
System.out.println("*** reached EOF ***");
}
in.close();
} catch (Throwable e) {
e.printStackTrace();
}
}
/** dummy test creating instances of sample and handler, and calling handle*/
private static void dummyTestSeparate(InRAMCompiler irc) {
try {
Class hc = irc.load("gen_"+SAMPLE_NAME_FOO+"Handler");
Object h = hc.newInstance();
Class fc = irc.load(SAMPLE_NAME_FOO);
Object f = fc.newInstance();
Field x = fc.getDeclaredField("x");
Field y = fc.getDeclaredField("y");
Field z = fc.getDeclaredField("z");
x.setInt(f, 10);
y.setInt(f, 11);
z.setInt(f, 12);
Method m;
try {
m = hc.getDeclaredMethod("handle_"+SAMPLE_NAME_FOO, fc);
m.invoke(h, f);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchFieldException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
examples/dynamic/test/InRAMCompilerJavax.java
View file @ 2d0cba67
......@@ -48,6 +48,8 @@ import javax.tools.ToolProvider;
public class InRAMCompilerJavax implements InRAMCompiler {
private boolean debug;
// Source for both test classes. They go in package
// "just.generated"
......@@ -127,6 +129,18 @@ public class InRAMCompilerJavax implements InRAMCompiler {
createNewClassLoader(providedClassLoader);
}
/**
*
* @param pkgName - The package for the generated classes. The source code must only contain classes in this package.
* @param cl - An optional (i.e., may be null) classloader that is also searched
*
* @param debug - set to true to turn on debug output
*/
public InRAMCompilerJavax(String pkgName, ClassLoader cl, boolean debug) {
this(pkgName, cl);
this.debug = debug;
}
/* (non-Javadoc)
* @see se.lth.cs.sven.rosettaTest.cc.InRAMCompiler#deleteClass(java.lang.String)
......@@ -202,7 +216,9 @@ public class InRAMCompilerJavax implements InRAMCompiler {
jfm.isCompiling(false);
// Traces the classes now found in the cache
System.out.println("\nInRAMCompiler: generated classes = " + output.keySet());
if(debug) {
System.out.println("\nInRAMCompiler: generated classes = " + output.keySet());
}
}
/* (non-Javadoc)
......@@ -378,7 +394,9 @@ trick:
RAMClassLoader(Map<String, JavaFileObject> output, ClassLoader cl) {
this.output = output;
this.classLoader = cl;
testGetResources();
if(debug) {
testGetResources();
}
}
private void testGetResources() {
......@@ -395,8 +413,10 @@ trick:
try {
//XXX This is a hack! Look in "parent" class loader first, to find correct Service instances.
if(classLoader != null) {
System.out.println("RAMClassLoader.findClass: getResource (package): "+classLoader.getResource("se/lth/cs/sven/rosettaTest"));
System.out.println("RAMClassLoader.findClass: getResource: "+classLoader.getResource("se/lth/cs/sven/rosettaTest/Constraint.class"));
if(debug) {
System.out.println("RAMClassLoader.findClass: getResource (package): "+classLoader.getResource("se/lth/cs/sven/rosettaTest"));
System.out.println("RAMClassLoader.findClass: getResource: "+classLoader.getResource("se/lth/cs/sven/rosettaTest/Constraint.class"));
}
try {
Class<?> c = classLoader.loadClass(name);
......
examples/dynamic/test/TestLabcommGen.java
View file @ 2d0cba67
......@@ -208,7 +208,7 @@ public class TestLabcommGen {
}
System.out.println("Generated labcomm code:");
InRAMCompiler irc = new InRAMCompilerJavax("labcomm.generated", TestLabcommGen.class.getClassLoader());
InRAMCompiler irc = new InRAMCompilerJavax("labcomm.generated", TestLabcommGen.class.getClassLoader(), true);
StringBuilder handlerClass = new StringBuilder();
StringBuilder handlerMethods = new StringBuilder();
......@@ -219,7 +219,8 @@ public class TestLabcommGen {
String handlerAttributes = "Object context;\n";
String handlerConstructor = "public "+handlerClassName+"(Object context){ this.context=context;}\n";
String handlerConstr = "public "+handlerClassName+"(){ super();}\n";
String handlerConstrCtxt = "public "+handlerClassName+"(Object context){ this.context=context;}\n";
Iterator<String> i = genCode.keySet().iterator();
try {
......@@ -237,7 +238,8 @@ public class TestLabcommGen {
}
handlerClass.append("{\n");
handlerClass.append(handlerAttributes);
handlerClass.append(handlerConstructor);
handlerClass.append(handlerConstr);
handlerClass.append(handlerConstrCtxt);
handlerClass.append(handlerMethods.toString());
handlerClass.append("}\n");
......
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