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Jython 2.7 compatibility #250

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Jython 2.7 compatibility #250

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6044dc1
Fix invalid cast (PyNone -> PyFunction) in Jython 2.7
tommy-gilligan Jun 30, 2022
d2d219b
Import nodetoolkit from sys when it is there
tommy-gilligan Jun 30, 2022
e4ec91e
Use __code__ with Jython 2.7 and func_code with Jython 2.5
tommy-gilligan Jun 30, 2022
08abd22
Default to Jython 2.7.2
tommy-gilligan Jul 6, 2022
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2 changes: 1 addition & 1 deletion nodel-jyhost/build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ dependencies {
compile project(':nodel-framework')
compile 'commons-daemon:commons-daemon:1.0.15'
compile 'org.slf4j:slf4j-api:1.7.10'
compile 'org.python:jython-standalone:2.5.4-rc1'
compile 'org.python:jython-standalone:2.7.2'

// for the Nodel HTTP client:
compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.5'
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88 changes: 59 additions & 29 deletions nodel-jyhost/src/main/java/org/nodel/jyhost/PyNode.java
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@
import org.python.core.PyDictionary;
import org.python.core.PyException;
import org.python.core.PyFunction;
import org.python.core.PyInteger;
import org.python.core.PyObject;
import org.python.core.PyString;
import org.python.core.PySystemState;
Expand Down Expand Up @@ -625,10 +626,16 @@ private void applyConfig0(NodeConfig config) throws Exception {
lock = getAReentrantLock();

trackFunction("(toolkit injection)");

// use this import to provide a toolkit directly into the script
_python.exec("from nodetoolkit import *");

if (((PyInteger) _python.eval("'nodetoolkit' in dir(__import__('sys'))")).asInt() > 0) {
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There's maybe a nicer way of getting a boolean back from the interpreter but AFAICT this works.

// Jython 2.7 exposes system state through sys
_python.exec("from sys.nodetoolkit import *");
} else {
// Jython 2.5 exposes system state at top-level
_python.exec("from nodetoolkit import *");
}

} finally {
untrackFunction("(toolkit injection)");

Expand Down Expand Up @@ -742,28 +749,33 @@ private void applyConfig0(NodeConfig config) throws Exception {
List<String> commentary = new ArrayList<>(3);

trackFunction("mains");

// handle @before_main functions (if present)
PyFunction processBeforeMainFunctions = (PyFunction) _globals.get(Py.java2py("processBeforeMainFunctions"));
long beforeFnCount = processBeforeMainFunctions.__call__().asLong();

if (beforeFnCount > 0)
if (_globals.get(Py.java2py("processBeforeMainFunctions")) instanceof PyFunction) {
PyFunction processBeforeMainFunctions = (PyFunction) _globals.get(Py.java2py("processBeforeMainFunctions"));
long beforeFnCount = processBeforeMainFunctions.__call__().asLong();

if (beforeFnCount > 0)
commentary.add("'@before_main' function" + (beforeFnCount == 1 ? "" : "s"));

// call 'main' if it exists
PyFunction mainFunction = (PyFunction) _python.get("main");
if (mainFunction != null) {
}

if (_python.get("main") instanceof PyFunction) {
PyFunction mainFunction = (PyFunction) _python.get("main");
if (mainFunction != null) {
mainFunction.__call__();

commentary.add("'main'");
}
}

// handle @after_main functions (if present)
PyFunction processAfterMainFunctions = (PyFunction) _globals.get(Py.java2py("processAfterMainFunctions"));
long afterFnCount = processAfterMainFunctions.__call__().asLong();
if (afterFnCount > 0)
if (_globals.get(Py.java2py("processAfterMainFunctions")) instanceof PyFunction) {
PyFunction processAfterMainFunctions = (PyFunction) _globals.get(Py.java2py("processAfterMainFunctions"));
long afterFnCount = processAfterMainFunctions.__call__().asLong();
if (afterFnCount > 0)
commentary.add("'@after_main' function" + (afterFnCount == 1 ? "" : "s"));

}


// nothing went wrong, kick off toolkit
_toolkit.enable();
Expand Down Expand Up @@ -904,21 +916,23 @@ private void cleanupInterpreter() {

_logger.info(message);
_outReader.inject(message);

try {
PyFunction processCleanupFunctions = (PyFunction) _globals.get(Py.java2py("processCleanupFunctions"));
long cleanupFnCount = processCleanupFunctions.__call__().asLong();

if (cleanupFnCount > 0) {
message = "('@at_cleanup' function" + (cleanupFnCount == 1 ? "" : "s") + " completed.)";
_logger.info(message);
_outReader.inject(message);
if (_globals.get(Py.java2py("processCleanupFunctions")) instanceof PyFunction) {
PyFunction processCleanupFunctions = (PyFunction) _globals.get(Py.java2py("processCleanupFunctions"));
long cleanupFnCount = processCleanupFunctions.__call__().asLong();

if (cleanupFnCount > 0) {
message = "('@at_cleanup' function" + (cleanupFnCount == 1 ? "" : "s") + " completed.)";
_logger.info(message);
_outReader.inject(message);
}
}
} catch (Exception exc) {
// upstream exception handling should mean we never get here, but just in case
_logger.warn("Unexpected exception during cleaning up; should be safe to ignore", exc);
}

_python.cleanup();

message = "(clean up complete)";
Expand Down Expand Up @@ -1062,9 +1076,17 @@ protected Object handleActionRequest(SimpleName action, Object arg) {

throw new IllegalStateException("Action call failure (internal server error) - '" + functionName + "'");
}

PyFunction pyFunction = (PyFunction) pyObject;
PyBaseCode code = (PyBaseCode) pyFunction.func_code;
PyBaseCode code = null;
Class<?> objectClass = pyFunction.getClass();
try {
// Jython 2.5
code = (PyBaseCode) objectClass.getField("func_code").get(pyFunction);
} catch (NoSuchFieldException e) {
// Jython 2.7
code = (PyBaseCode) objectClass.getField("__code__").get(pyFunction);
}

// only support either 0 or 1 args
PyObject pyResult;
Expand Down Expand Up @@ -1332,7 +1354,15 @@ private void handleRemoteEventArrival(SimpleName alias, NodelClientEvent nodelCl
}

PyFunction pyFunction = (PyFunction) pyObject;
PyBaseCode code = (PyBaseCode) pyFunction.func_code;
PyBaseCode code = null;
Class<?> objectClass = pyFunction.getClass();
try {
// Jython 2.5
code = (PyBaseCode) objectClass.getField("func_code").get(pyFunction);
} catch (NoSuchFieldException e) {
// Jython 2.7
code = (PyBaseCode) objectClass.getField("__code__").get(pyFunction);
}

// only support either 0 or 1 args
if (code.co_argcount == 0)
Expand Down