/*
* Copyright 2012 Future Systems
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.araqne.logdb.jython.impl;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Invalidate;
import org.apache.felix.ipojo.annotations.Provides;
import org.apache.felix.ipojo.annotations.Requires;
import org.apache.felix.ipojo.annotations.Validate;
import org.araqne.confdb.Config;
import org.araqne.confdb.ConfigCollection;
import org.araqne.confdb.ConfigDatabase;
import org.araqne.confdb.ConfigIterator;
import org.araqne.confdb.ConfigService;
import org.araqne.confdb.Predicate;
import org.araqne.confdb.Predicates;
import org.araqne.jython.JythonService;
import org.araqne.logdb.QueryScript;
import org.araqne.logdb.QueryScriptFactory;
import org.araqne.logdb.QueryScriptRegistry;
import org.araqne.logdb.jython.JythonQueryScriptRegistry;
import org.python.core.PyObject;
import org.python.util.PythonInterpreter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Component(name = "jython-query-script-registry")
@Provides
public class JythonQueryScriptRegistryImpl implements JythonQueryScriptRegistry {
private final Logger logger = LoggerFactory.getLogger(JythonQueryScriptRegistryImpl.class);
@Requires
private ConfigService conf;
@Requires
private JythonService jython;
@Requires
private QueryScriptRegistry logScriptRegistry;
private ConcurrentMap<String, ConcurrentMap<String, PyObject>> workspaceScripts;
@Validate
public void start() {
workspaceScripts = new ConcurrentHashMap<String, ConcurrentMap<String, PyObject>>();
// load scripts
ConfigDatabase db = conf.ensureDatabase("araqne-logdb-jython");
ConfigIterator it = null;
try {
it = db.find(ScriptConfig.class, Predicates.field("type", "query"));
for (ScriptConfig sc : it.getDocuments(ScriptConfig.class)) {
try {
PyObject o = eval(sc.getName(), sc.getScript());
ConcurrentMap<String, PyObject> scripts = new ConcurrentHashMap<String, PyObject>();
ConcurrentMap<String, PyObject> old = workspaceScripts.putIfAbsent(sc.getWorkspace(), scripts);
if (old != null)
scripts = old;
scripts.put(sc.getName(), o);
} catch (Throwable t) {
logger.error("araqne logdb jython: cannot load script [" + sc.getName() + "]", t);
}
}
} finally {
it.close();
}
// register all
for (String workspace : workspaceScripts.keySet()) {
ConcurrentMap<String, PyObject> scripts = workspaceScripts.get(workspace);
for (String name : scripts.keySet())
try {
PyObject factory = scripts.get(name);
logScriptRegistry.addScriptFactory(workspace, name, new LogScriptFactoryImpl(factory));
} catch (Throwable t) {
logger.error("araqne logdb jython: cannot register script [" + name + "]", t);
}
}
}
@Invalidate
public void stop() {
if (logScriptRegistry != null) {
for (String workspace : workspaceScripts.keySet()) {
ConcurrentMap<String, PyObject> scripts = workspaceScripts.get(workspace);
for (String name : scripts.keySet())
logScriptRegistry.removeScriptFactory(workspace, name);
}
}
if (jython != null)
jython.unregisterInterpreter("logdb");
}
@Override
public Set<String> getWorkspaceNames() {
return Collections.unmodifiableSet(workspaceScripts.keySet());
}
@Override
public void dropWorkspace(String name) {
}
@Override
public Set<String> getScriptNames(String workspace) {
ConcurrentMap<String, PyObject> scripts = workspaceScripts.get(workspace);
if (scripts == null)
return null;
return scripts.keySet();
}
@Override
public String getScriptCode(String workspace, String name) {
ConfigDatabase db = conf.ensureDatabase("araqne-logdb-jython");
ConfigCollection col = db.ensureCollection("scripts");
Config c = col.findOne(getPredicate(workspace, name));
if (c == null)
return null;
ScriptConfig sc = c.getDocument(ScriptConfig.class);
return sc.getScript();
}
@Override
public QueryScript newLogScript(String workspace, String name, Map<String, Object> params) {
ConcurrentMap<String, PyObject> scripts = workspaceScripts.get(workspace);
if (scripts == null)
return null;
PyObject factory = scripts.get(name);
if (factory == null)
return null;
PyObject instance = factory.__call__();
return (QueryScript) instance.__tojava__(QueryScript.class);
}
@Override
public void loadScript(String workspace, String name, String script) {
PyObject factory = eval(name, script);
ConcurrentMap<String, PyObject> scripts = new ConcurrentHashMap<String, PyObject>();
ConcurrentMap<String, PyObject> old = workspaceScripts.putIfAbsent(workspace, scripts);
if (old != null)
scripts = old;
scripts.put(name, factory);
ConfigDatabase db = conf.ensureDatabase("araqne-logdb-jython");
Config c = db.findOne(ScriptConfig.class, getPredicate(workspace, name));
if (c == null) {
ScriptConfig sc = new ScriptConfig(workspace, name, "query", script);
db.add(sc);
// add to logdb script registry
logScriptRegistry.addScriptFactory(workspace, name, new LogScriptFactoryImpl(factory));
} else {
ScriptConfig sc = new ScriptConfig(workspace, name, "query", script);
db.update(c, sc);
logScriptRegistry.removeScriptFactory(workspace, name);
logScriptRegistry.addScriptFactory(workspace, name, new LogScriptFactoryImpl(factory));
}
}
@Override
public void unloadScript(String workspace, String name) {
ConfigDatabase db = conf.ensureDatabase("araqne-logdb-jython");
ConfigCollection col = db.ensureCollection("scripts");
Config c = col.findOne(Predicates.field("name", name));
if (c == null)
throw new IllegalStateException("script not found: " + name);
col.remove(c);
// remove from memory
ConcurrentMap<String, PyObject> scripts = workspaceScripts.get(workspace);
if (scripts == null)
return;
scripts.remove(name);
// remove from logdb script registry
logScriptRegistry.removeScriptFactory(workspace, name);
}
private PyObject eval(String name, String script) {
PythonInterpreter interpreter = jython.newInterpreter();
interpreter.exec("from org.araqne.logdb import LogQueryScript");
interpreter.exec("from org.araqne.logdb import BaseLogQueryScript");
interpreter.exec(script);
PyObject clazz = interpreter.get(name);
if (clazz == null)
throw new IllegalStateException("cannot eval jython script " + name);
return clazz;
}
private Predicate getPredicate(String workspace, String name) {
Map<String, Object> pred = new HashMap<String, Object>();
pred.put("workspace", workspace);
pred.put("name", name);
pred.put("type", "query");
return Predicates.field(pred);
}
private static class LogScriptFactoryImpl implements QueryScriptFactory {
private PyObject factory;
public LogScriptFactoryImpl(PyObject factory) {
this.factory = factory;
}
@Override
public QueryScript create(Map<String, String> params) {
PyObject instance = factory.__call__();
return (QueryScript) instance.__tojava__(QueryScript.class);
}
@Override
public String getDescription() {
PyObject __doc__ = factory.getDoc();
String doc = (String) __doc__.__tojava__(String.class);
if (doc == null)
return "N/A";
return doc.trim();
}
@Override
public String toString() {
return getDescription();
}
}
}