Examples with ConstraintEvaluator io.automatiko.engine.workflow.base.instance.impl.ConstraintEvaluator used on opensource projects

Example 1 with ConstraintEvaluator

use of io.automatiko.engine.workflow.base.instance.impl.ConstraintEvaluator in project automatiko-engine by automatiko-io.

the class SplitInstance method executeStrategy.

protected void executeStrategy(Split split, String type) {
    // TODO make different strategies for each type
    String uniqueId = (String) getNode().getMetaData().get(UNIQUE_ID);
    if (uniqueId == null) {
        uniqueId = ((NodeImpl) getNode()).getUniqueId();
    }
    switch(split.getType()) {
        case Split.TYPE_AND:
            triggerCompleted(io.automatiko.engine.workflow.process.core.Node.CONNECTION_DEFAULT_TYPE, true);
            break;
        case Split.TYPE_XOR:
            List<Connection> outgoing = split.getDefaultOutgoingConnections();
            int priority = Integer.MAX_VALUE;
            Connection selected = null;
            for (final Iterator<Connection> iterator = outgoing.iterator(); iterator.hasNext(); ) {
                final Connection connection = (Connection) iterator.next();
                ConstraintEvaluator constraint = (ConstraintEvaluator) split.getConstraint(connection);
                if (constraint != null && constraint.getPriority() < priority && !constraint.isDefault()) {
                    try {
                        if (constraint.evaluate(this, connection, constraint)) {
                            selected = connection;
                            priority = constraint.getPriority();
                        }
                    } catch (RuntimeException e) {
                        throw new RuntimeException("Exception when trying to evaluate constraint " + constraint.getName() + " in split " + split.getName(), e);
                    }
                }
            }
            ((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
            if (selected == null) {
                for (final Iterator<Connection> iterator = outgoing.iterator(); iterator.hasNext(); ) {
                    final Connection connection = (Connection) iterator.next();
                    if (split.isDefault(connection)) {
                        selected = connection;
                        break;
                    }
                }
            }
            if (selected == null) {
                throw new IllegalArgumentException("XOR split could not find at least one valid outgoing connection for split " + getSplit().getName());
            }
            if (!hasLoop(selected.getTo(), split)) {
                setLevel(1);
                ((NodeInstanceContainer) getNodeInstanceContainer()).setCurrentLevel(1);
            }
            triggerConnection(selected);
            ((WorkflowProcessInstanceImpl) getProcessInstance()).addCompletedNodeId(uniqueId);
            break;
        case Split.TYPE_OR:
            ((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
            outgoing = split.getDefaultOutgoingConnections();
            boolean found = false;
            List<NodeInstanceTrigger> nodeInstances = new ArrayList<NodeInstanceTrigger>();
            List<Connection> outgoingCopy = new ArrayList<Connection>(outgoing);
            while (!outgoingCopy.isEmpty()) {
                priority = Integer.MAX_VALUE;
                Connection selectedConnection = null;
                ConstraintEvaluator selectedConstraint = null;
                for (final Iterator<Connection> iterator = outgoingCopy.iterator(); iterator.hasNext(); ) {
                    final Connection connection = (Connection) iterator.next();
                    ConstraintEvaluator constraint = (ConstraintEvaluator) split.getConstraint(connection);
                    if (constraint != null && constraint.getPriority() < priority && !constraint.isDefault()) {
                        priority = constraint.getPriority();
                        selectedConnection = connection;
                        selectedConstraint = constraint;
                    }
                }
                if (selectedConstraint == null) {
                    break;
                }
                if (selectedConstraint.evaluate(this, selectedConnection, selectedConstraint)) {
                    nodeInstances.add(new NodeInstanceTrigger(followConnection(selectedConnection), selectedConnection.getToType()));
                    found = true;
                }
                outgoingCopy.remove(selectedConnection);
            }
            for (NodeInstanceTrigger nodeInstance : nodeInstances) {
                // stop if this process instance has been aborted / completed
                if (getProcessInstance().getState() == STATE_COMPLETED || getProcessInstance().getState() == STATE_ABORTED) {
                    return;
                }
                triggerNodeInstance(nodeInstance.getNodeInstance(), nodeInstance.getToType());
            }
            if (!found) {
                for (final Iterator<Connection> iterator = outgoing.iterator(); iterator.hasNext(); ) {
                    final Connection connection = (Connection) iterator.next();
                    ConstraintEvaluator constraint = (ConstraintEvaluator) split.getConstraint(connection);
                    if (constraint != null && constraint.isDefault() || split.isDefault(connection)) {
                        triggerConnection(connection);
                        found = true;
                        break;
                    }
                }
            }
            if (!found) {
                throw new IllegalArgumentException("OR split could not find at least one valid outgoing connection for split " + getSplit().getName());
            }
            ((WorkflowProcessInstanceImpl) getProcessInstance()).addCompletedNodeId(uniqueId);
            break;
        case Split.TYPE_XAND:
            ((io.automatiko.engine.workflow.process.instance.NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
            Node node = getNode();
            List<Connection> connections = null;
            if (node != null) {
                connections = node.getOutgoingConnections(type);
            }
            if (connections == null || connections.isEmpty()) {
                ((io.automatiko.engine.workflow.process.instance.NodeInstanceContainer) getNodeInstanceContainer()).nodeInstanceCompleted(this, type);
            } else {
                ExclusiveGroupInstance groupInstance = new ExclusiveGroupInstance();
                io.automatiko.engine.api.runtime.process.NodeInstanceContainer parent = getNodeInstanceContainer();
                if (parent instanceof ContextInstanceContainer) {
                    ((ContextInstanceContainer) parent).addContextInstance(ExclusiveGroup.EXCLUSIVE_GROUP, groupInstance);
                } else {
                    throw new IllegalArgumentException("An Exclusive AND is only possible if the parent is a context instance container");
                }
                Map<io.automatiko.engine.workflow.process.instance.NodeInstance, String> nodeInstancesMap = new HashMap<io.automatiko.engine.workflow.process.instance.NodeInstance, String>();
                for (Connection connection : connections) {
                    nodeInstancesMap.put(followConnection(connection), connection.getToType());
                }
                for (NodeInstance nodeInstance : nodeInstancesMap.keySet()) {
                    groupInstance.addNodeInstance(nodeInstance);
                }
                for (Map.Entry<io.automatiko.engine.workflow.process.instance.NodeInstance, String> entry : nodeInstancesMap.entrySet()) {
                    // stop if this process instance has been aborted / completed
                    if (getProcessInstance().getState() != ProcessInstance.STATE_ACTIVE) {
                        return;
                    }
                    boolean hidden = false;
                    if (getNode().getMetaData().get("hidden") != null) {
                        hidden = true;
                    }
                    InternalProcessRuntime runtime = getProcessInstance().getProcessRuntime();
                    if (!hidden) {
                        runtime.getProcessEventSupport().fireBeforeNodeLeft(this, runtime);
                    }
                    ((io.automatiko.engine.workflow.process.instance.NodeInstance) entry.getKey()).trigger(this, entry.getValue());
                    if (!hidden) {
                        runtime.getProcessEventSupport().fireAfterNodeLeft(this, runtime);
                    }
                }
            }
            ((WorkflowProcessInstanceImpl) getProcessInstance()).addCompletedNodeId(uniqueId);
            break;
        default:
            throw new IllegalArgumentException("Illegal split type " + split.getType());
    }
}

Example 2 with ConstraintEvaluator

use of io.automatiko.engine.workflow.base.instance.impl.ConstraintEvaluator in project automatiko-engine by automatiko-io.

the class NodeInstanceImpl method continueToNextNode.

protected void continueToNextNode(String type, Node node) {
    List<Connection> connections = null;
    if (node != null) {
        if ("true".equals(System.getProperty("jbpm.enable.multi.con")) && ((NodeImpl) node).getConstraints().size() > 0) {
            int priority;
            connections = ((NodeImpl) node).getDefaultOutgoingConnections();
            boolean found = false;
            List<NodeInstanceTrigger> nodeInstances = new ArrayList<>();
            List<Connection> outgoingCopy = new ArrayList<>(connections);
            while (!outgoingCopy.isEmpty()) {
                priority = Integer.MAX_VALUE;
                Connection selectedConnection = null;
                ConstraintEvaluator selectedConstraint = null;
                for (final Connection connection : outgoingCopy) {
                    ConstraintEvaluator constraint = (ConstraintEvaluator) ((NodeImpl) node).getConstraint(connection);
                    if (constraint != null && constraint.getPriority() < priority && !constraint.isDefault()) {
                        priority = constraint.getPriority();
                        selectedConnection = connection;
                        selectedConstraint = constraint;
                    }
                }
                if (selectedConstraint == null) {
                    break;
                }
                if (selectedConstraint.evaluate(this, selectedConnection, selectedConstraint)) {
                    nodeInstances.add(new NodeInstanceTrigger(followConnection(selectedConnection), selectedConnection.getToType()));
                    found = true;
                }
                outgoingCopy.remove(selectedConnection);
            }
            for (NodeInstanceTrigger nodeInstance : nodeInstances) {
                // stop if this process instance has been aborted / completed
                if (((io.automatiko.engine.workflow.process.instance.NodeInstanceContainer) getNodeInstanceContainer()).getState() != STATE_ACTIVE) {
                    return;
                }
                triggerNodeInstance(nodeInstance.getNodeInstance(), nodeInstance.getToType());
            }
            if (!found) {
                for (final Connection connection : connections) {
                    ConstraintEvaluator constraint = (ConstraintEvaluator) ((NodeImpl) node).getConstraint(connection);
                    if (constraint.isDefault()) {
                        triggerConnection(connection);
                        found = true;
                        break;
                    }
                }
            }
            if (!found) {
                throw new IllegalArgumentException("Uncontrolled flow node could not find at least one valid outgoing connection " + getNode().getName());
            }
            return;
        } else {
            connections = node.getOutgoingConnections(type);
        }
    }
    if (connections == null || connections.isEmpty()) {
        boolean hidden = false;
        Node currentNode = getNode();
        if (currentNode != null && currentNode.getMetaData().get(HIDDEN) != null) {
            hidden = true;
        }
        InternalProcessRuntime runtime = getProcessInstance().getProcessRuntime();
        if (!hidden) {
            runtime.getProcessEventSupport().fireBeforeNodeLeft(this, runtime);
        }
        // notify container
        ((io.automatiko.engine.workflow.process.instance.NodeInstanceContainer) getNodeInstanceContainer()).nodeInstanceCompleted(this, type);
        if (!hidden) {
            runtime.getProcessEventSupport().fireAfterNodeLeft(this, runtime);
        }
    } else {
        Map<io.automatiko.engine.workflow.process.instance.NodeInstance, String> nodeInstances = new HashMap<>();
        for (Connection connection : connections) {
            nodeInstances.put(followConnection(connection), connection.getToType());
        }
        for (Map.Entry<io.automatiko.engine.workflow.process.instance.NodeInstance, String> nodeInstance : nodeInstances.entrySet()) {
            // stop if this process instance has been aborted / completed
            int state = ((io.automatiko.engine.workflow.process.instance.NodeInstanceContainer) getNodeInstanceContainer()).getState();
            if (state == STATE_COMPLETED || state == STATE_ABORTED) {
                return;
            }
            try {
                triggerNodeInstance(nodeInstance.getKey(), nodeInstance.getValue());
            } catch (Exception e) {
                logger.warn("Error caught at executing node instance " + nodeInstance.getKey(), e);
            }
        }
    }
}