3:22 a.m.
hi,
i developed my project using drools 2.5. now i want to upgrade to drools
4.0. in my project i
(1) create xml file,
(2) compile xml file & get jar file,
(3) save jar file
(4) and load jar file when i need to run rules
i was able to upgrade xml file to drools 4.0 xml format, but i can not do
necessary modification in code to compile xml and get "jar or any reloadable
file".
There is my code that is developed for drools 2.5. Can you help me to
upgrade it for drools 4.0?
void compile() throws Exception {
// read xml file, returns data in xml format
String rulecontent = readRuleFromFile();
byte[] bytes = null;
// codes for drools 2.5. i want to develop corresponding code for 4
statement bellow that runs with drools 4.0
// RuleSetReader reader = new RuleSetReader();
// RuleSet ruleSet = reader.read(new BufferedReader(new
StringReader(rulecontent)));
// RuleSetCompiler compiler = new RuleSetCompiler(ruleSet, "com.sample",
"knowledgeHelper");
// bytes = compiler.getBinaryDeploymentJar();
// some codes for drools 4.0, but it is not finilized
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new
StringReader(rulecontent)));
Package pkg = builder.getPackage();
//... and then what? how do it get bytecode from package?
//may be 3 statements are not necessary for compilation
// save to disk as a jar file
writeRuleToJar(bytes);
}
void runrule(Object usg) throws Exception {
// runs both, drools 2.5 and drools 4.0
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(conflictResolvers);
byte[] bytecode = readRuleFromJar();
// i can not develope this part also
// RuleBaseLoader loader = new RuleBaseLoader(compositeConflictResolver);
// loader.addFromByteArray(bytecode);
// RuleBase ruleBase = loader.buildRuleBase();
// modification in code for drools 4.0
// WorkingMemory workingMemory = ruleBase.newWorkingMemory();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
// workingMemory.assertObject(usg);
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
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4:02 a.m.
While drools 2.x was limited to XML, 4.0 preference is for the DRL,
which is a none xml format. It doesn't produce a jar at the moment just
a binary Packaage instance, which you can serialise.
Mark
fuadhamidov wrote:
hi,
i developed my project using drools 2.5. now i want to upgrade to drools
4.0. in my project i
(1) create xml file,
(2) compile xml file & get jar file,
(3) save jar file
(4) and load jar file when i need to run rules
i was able to upgrade xml file to drools 4.0 xml format, but i can not do
necessary modification in code to compile xml and get "jar or any reloadable
file".
There is my code that is developed for drools 2.5. Can you help me to
upgrade it for drools 4.0?
void compile() throws Exception {
// read xml file, returns data in xml format
String rulecontent = readRuleFromFile();
byte[] bytes = null;
// codes for drools 2.5. i want to develop corresponding code for 4
statement bellow that runs with drools 4.0
// RuleSetReader reader = new RuleSetReader();
// RuleSet ruleSet = reader.read(new BufferedReader(new
StringReader(rulecontent)));
// RuleSetCompiler compiler = new RuleSetCompiler(ruleSet, "com.sample",
"knowledgeHelper");
// bytes = compiler.getBinaryDeploymentJar();
// some codes for drools 4.0, but it is not finilized
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new
StringReader(rulecontent)));
Package pkg = builder.getPackage();
//... and then what? how do it get bytecode from package?
//may be 3 statements are not necessary for compilation
// save to disk as a jar file
writeRuleToJar(bytes);
}
void runrule(Object usg) throws Exception {
// runs both, drools 2.5 and drools 4.0
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(conflictResolvers);
byte[] bytecode = readRuleFromJar();
// i can not develope this part also
// RuleBaseLoader loader = new RuleBaseLoader(compositeConflictResolver);
// loader.addFromByteArray(bytecode);
// RuleBase ruleBase = loader.buildRuleBase();
// modification in code for drools 4.0
// WorkingMemory workingMemory = ruleBase.newWorkingMemory();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
// workingMemory.assertObject(usg);
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
2:30 a.m.
ok, now final state of my code is as bellow.
now my question is this: how do i define compositeConflictResolver to
RuleBase?
private static void runrule(CmsFlightServiceUsg usg) throws Exception {
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(
conflictResolvers);
Package pkg = (Package) readSerializedObject();
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(pkg);
WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
private static void compile() throws Exception {
String rulecontent = readRuleFromFile();
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new StringReader(
rulecontent)));
Package pkg = builder.getPackage();
writeSerializedObject(pkg);
}
private static void writeSerializedObject(Object object) throws IOException
{
FileOutputStream fileOutputStream = new FileOutputStream("sample.txt");
ObjectOutputStream objectOutputStream = new ObjectOutputStream(
fileOutputStream);
objectOutputStream.writeObject(object);
objectOutputStream.close();
}
private static Object readSerializedObject() throws IOException,
ClassNotFoundException {
FileInputStream fileInputStream = new FileInputStream("sample.txt");
ObjectInputStream objectInputStream = new ObjectInputStream(
fileInputStream);
Object object = objectInputStream.readObject();
return object;
}
Mark Proctor wrote:
While drools 2.x was limited to XML, 4.0 preference is for the DRL,
which is a none xml format. It doesn't produce a jar at the moment just
a binary Packaage instance, which you can serialise.
Mark
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6:25 a.m.
Why do you want to do that? just stick with the default conflict
resolver. If you really want to do this over ride the setting on the
RuleBaseConfiguration.
I discussed setting this property in the email yesterday with the
subject "Re: [rules-users] Decision Tables: Probelm with sequence=true".
Mark
fuadhamidov wrote:
ok, now final state of my code is as bellow.
now my question is this: how do i define compositeConflictResolver to
RuleBase?
private static void runrule(CmsFlightServiceUsg usg) throws Exception {
ConflictResolver[] conflictResolvers = new ConflictResolver[] {
SalienceConflictResolver.getInstance(),
ComplexityConflictResolver.getInstance(),
FifoConflictResolver.getInstance() };
CompositeConflictResolver compositeConflictResolver = new
CompositeConflictResolver(
conflictResolvers);
Package pkg = (Package) readSerializedObject();
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(pkg);
WorkingMemory workingMemory = ruleBase.newStatefulSession();
workingMemory.insert(usg);
workingMemory.fireAllRules();
}
private static void compile() throws Exception {
String rulecontent = readRuleFromFile();
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromXml(new BufferedReader(new StringReader(
rulecontent)));
Package pkg = builder.getPackage();
writeSerializedObject(pkg);
}
private static void writeSerializedObject(Object object) throws IOException
{
FileOutputStream fileOutputStream = new FileOutputStream("sample.txt");
ObjectOutputStream objectOutputStream = new ObjectOutputStream(
fileOutputStream);
objectOutputStream.writeObject(object);
objectOutputStream.close();
}
private static Object readSerializedObject() throws IOException,
ClassNotFoundException {
FileInputStream fileInputStream = new FileInputStream("sample.txt");
ObjectInputStream objectInputStream = new ObjectInputStream(
fileInputStream);
Object object = objectInputStream.readObject();
return object;
}
Mark Proctor wrote:
> While drools 2.x was limited to XML, 4.0 preference is for the DRL,
> which is a none xml format. It doesn't produce a jar at the moment just
> a binary Packaage instance, which you can serialise.
>
> Mark
>
>
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3 comments
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participants (2)
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fuadhamidov -
Mark Proctor