[rules-users] Problem when using multiple rule files (Drools 5)

[Erik Clairiot]

this approach works fine, I use it this way (import / export)


	public Collection<KnowledgePackage> importPackages(InputStream input) {
		Collection<KnowledgePackage> pkgs = Collections.emptyList();
				
		try {
			if (input == null || input.available() <= 0)
				return pkgs;
			
			ObjectInputStream ois = new ObjectInputStream(input);
			pkgs = (Collection<KnowledgePackage>) ois.readObject();
			return pkgs;
		} catch (IOException e) {
			LOG.warn("IOException during package import : " + e.getMessage());
		} catch (ClassNotFoundException e) {
			LOG.warn("Class saved in the stream does not exists : " +
e.getMessage());
		}
		return pkgs;
	}


	boolean exportPackages(Collection<KnowledgePackage> pkgs, OutputStream
output) {
		if (pkgs != null && pkgs.size() > 0 && output != null){
			try {
				ObjectOutputStream oos = new ObjectOutputStream(output);
				oos.writeObject(pkgs);
				oos.close();
				output.close();
				return true;
			} catch (IOException e) {
				LOG.warn("Error exporting rules package : " + e.getMessage());
			}
		}
		return false;
	}


tune it as you want, hope it helps.

Erik Clairiot


On Tue, 28 Jul 2009 06:50:21 -0700 (PDT), Olaf Raether <o.raether at epro.de>
wrote:
> now i found out, that my problems are in relation to my serialized
> KnowledgePackages.
> 
> When i use the following code and load the drl files everything is fine !
> 
> KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
> kbuilder.add(ResourceFactory.newClassPathResource(rules[i] + ".drl")),
> ResourceType.DRL); 
> 
> But this takes too long, when i used it the first time - so i want to use
> serialized 
> KnowledgePackages again. 
> 
> So my question is: What is the right way to serialize/deserialize 
> KnowledgePackages ?
> 
> As you have seen in my posts i used standard readObject/writeObject
> methods.
> Is this the right approach ?
> 
> Thanks.