Examples with ChainException org.apache.stanbol.enhancer.servicesapi.ChainException used on opensource projects

Example 6 with ChainException

use of org.apache.stanbol.enhancer.servicesapi.ChainException in project stanbol by apache.

the class EventJobManagerImpl method enhanceContent.

@Override
public void enhanceContent(ContentItem ci) throws EnhancementException {
    Chain defaultChain = chainManager.getDefault();
    if (defaultChain == null) {
        throw new ChainException("Unable to enhance ContentItem '" + ci.getUri() + "' because currently no enhancement chain is active. Please" + "configure a Chain or enable the default chain");
    }
    enhanceContent(ci, defaultChain);
}

Example 7 with ChainException

use of org.apache.stanbol.enhancer.servicesapi.ChainException in project stanbol by apache.

the class EventJobManagerImpl method getActiveEngines.

@Override
public List<EnhancementEngine> getActiveEngines() {
    //This implementation return the list of active engined for the default
    //Chain in the order they would be executed
    Chain defaultChain = chainManager.getDefault();
    if (defaultChain == null) {
        throw new IllegalStateException("Currently no enhancement chain is " + "active. Please configure a Chain or enable the default chain");
    }
    ImmutableGraph ep;
    try {
        ep = defaultChain.getExecutionPlan();
    } catch (ChainException e) {
        throw new IllegalStateException("Unable to get Execution Plan for " + "default enhancement chain (name: '" + defaultChain.getName() + "'| class: '" + defaultChain.getClass() + "')!", e);
    }
    return ExecutionPlanHelper.getActiveEngines(engineManager, ep);
}

Example 8 with ChainException

use of org.apache.stanbol.enhancer.servicesapi.ChainException in project stanbol by apache.

the class ExecutionPlanHelper method validateExecutionPlan.

/**
     * Utility that checks if the parsed graph contains a valid execution
     * plan. This method is intended to be used by components that need to
     * ensure that an parsed graph contains a valid execution plan.<p>
     * This especially checks: <ul>
     * <li> if for all {@link ExecutionPlan#EXECUTION_NODE}s
     * <li> if they define a unary and valid value for the
     * {@link ExecutionPlan#ENGINE} property and
     * <li> if all {@link ExecutionPlan#DEPENDS_ON} values do actually point
     * to an other execution node in the parsed graph
     * <ul><p>
     * This method does not modify the parsed graph. Therefore it is save
     * to parse a {@link ImmutableGraph} object.<p>
     * TODO: There is no check for cycles implemented yet.
     * @param the graph to check
     * @return the engine names referenced by the validated execution plan-
     * @throws ChainException
     */
public static Set<String> validateExecutionPlan(Graph executionPlan) throws ChainException {
    Iterator<Triple> executionNodeIt = executionPlan.filter(null, RDF_TYPE, EXECUTION_NODE);
    Set<String> engineNames = new HashSet<String>();
    Map<BlankNodeOrIRI, Collection<BlankNodeOrIRI>> nodeDependencies = new HashMap<BlankNodeOrIRI, Collection<BlankNodeOrIRI>>();
    //1. check the ExecutionNodes
    while (executionNodeIt.hasNext()) {
        BlankNodeOrIRI node = executionNodeIt.next().getSubject();
        Iterator<String> engines = EnhancementEngineHelper.getStrings(executionPlan, node, ENGINE);
        if (!engines.hasNext()) {
            throw new ChainException("Execution Node " + node + " does not define " + "the required property " + ENGINE + "!");
        }
        String engine = engines.next();
        if (engines.hasNext()) {
            throw new ChainException("Execution Node " + node + " does not define " + "multiple values for the property " + ENGINE + "!");
        }
        if (engine.isEmpty()) {
            throw new ChainException("Execution Node " + node + " does not define " + "an empty String as engine name (property " + ENGINE + ")!");
        }
        engineNames.add(engine);
        Collection<BlankNodeOrIRI> dependsOn = new HashSet<BlankNodeOrIRI>();
        for (Iterator<Triple> t = executionPlan.filter(node, DEPENDS_ON, null); t.hasNext(); ) {
            RDFTerm o = t.next().getObject();
            if (o instanceof BlankNodeOrIRI) {
                dependsOn.add((BlankNodeOrIRI) o);
            } else {
                throw new ChainException("Execution Node " + node + " defines the literal '" + o + "' as value for the " + DEPENDS_ON + " property. However this" + "property requires values to be bNodes or URIs.");
            }
        }
        nodeDependencies.put(node, dependsOn);
    }
    //2. now check the dependency graph
    for (Entry<BlankNodeOrIRI, Collection<BlankNodeOrIRI>> entry : nodeDependencies.entrySet()) {
        if (entry.getValue() != null) {
            for (BlankNodeOrIRI dependent : entry.getValue()) {
                if (!nodeDependencies.containsKey(dependent)) {
                    throw new ChainException("Execution Node " + entry.getKey() + " defines a dependency to an non existent ex:ExectutionNode " + dependent + "!");
                }
            //else the dependency is valid
            }
        }
    //no dependencies
    }
    //done ... the parsed graph survived all consistency checks :)
    return engineNames;
}