Examples with Agent org.apache.qpid.qmf2.console.Agent used on opensource projects

Example 31 with Agent

use of org.apache.qpid.qmf2.console.Agent in project qpid by apache.

the class Agent method raiseEvent.

/**
 * Cause the agent to raise the given event.
 *
 * @param event the QmfEvent to be raised
 */
public final void raiseEvent(final QmfEvent event) {
    try {
        String packageKey = event.getSchemaClassId().getPackageName().replace(".", "_");
        String nameKey = event.getSchemaClassId().getClassName().replace(".", "_");
        String severity = event.getSeverity();
        String vendorKey = _vendor.replace(".", "_");
        String productKey = _product.replace(".", "_");
        String instanceKey = _instance.replace(".", "_");
        String subject = "agent.ind.event." + packageKey + "." + nameKey + "." + severity + "." + vendorKey + "." + productKey + "." + instanceKey;
        Message response = AMQPMessage.createListMessage(_syncSession);
        response.setStringProperty("x-amqp-0-10.app-id", "qmf2");
        response.setStringProperty("method", "indication");
        response.setStringProperty("qmf.opcode", "_data_indication");
        response.setStringProperty("qmf.content", "_event");
        response.setStringProperty("qmf.agent", _name);
        response.setStringProperty("qpid.subject", subject);
        List<Map> results = new ArrayList<Map>();
        results.add(event.mapEncode());
        AMQPMessage.setList(response, results);
        _producer.send(_topicAddress, response);
    } catch (JMSException jmse) {
        _log.info("JMSException {} caught in raiseEvent()", jmse.getMessage());
    }
}

Example 32 with Agent

use of org.apache.qpid.qmf2.console.Agent in project qpid by apache.

the class Agent method handleQueryRequest.

/**
 * Handle the query request and send the response back to the Console.
 * @param handle the reply handle that contains the replyTo Address.
 * @param query the inbound query from the Console.
 */
@SuppressWarnings("unchecked")
private final void handleQueryRequest(final Handle handle, final QmfQuery query) {
    QmfQueryTarget target = query.getTarget();
    if (target == QmfQueryTarget.SCHEMA_ID) {
        List<Map> results = new ArrayList<Map>(_schemaCache.size());
        // Look up all SchemaClassId objects
        for (SchemaClassId classId : _schemaCache.keySet()) {
            results.add(classId.mapEncode());
        }
        // Send the response back to the Console.
        queryResponse(handle, results, "_schema_id");
    } else if (target == QmfQueryTarget.SCHEMA) {
        List<Map> results = new ArrayList<Map>(1);
        // Look up a SchemaClass object by the SchemaClassId obtained from the query
        SchemaClassId classId = query.getSchemaClassId();
        SchemaClass schema = _schemaCache.get(classId);
        if (schema != null) {
            results.add(schema.mapEncode());
        }
        // Send the response back to the Console.
        queryResponse(handle, results, "_schema");
    } else if (target == QmfQueryTarget.OBJECT_ID) {
        List<Map> results = new ArrayList<Map>(_objectIndex.size());
        // Look up all ObjectId objects
        for (ObjectId objectId : _objectIndex.keySet()) {
            results.add(objectId.mapEncode());
        }
        // Send the response back to the Console.
        queryResponse(handle, results, "_object_id");
    } else if (target == QmfQueryTarget.OBJECT) {
        // If this is implementing the AgentExternal model we pass the QmfQuery on in a QueryWorkItem
        if (this instanceof AgentExternal) {
            _eventListener.onEvent(new QueryWorkItem(handle, query));
            return;
        } else {
            // qmfContentType = "_data";
            if (query.getObjectId() != null) {
                List<Map> results = new ArrayList<Map>(1);
                // Look up a QmfAgentData object by the ObjectId obtained from the query
                ObjectId objectId = query.getObjectId();
                QmfAgentData object = _objectIndex.get(objectId);
                if (object != null && !object.isDeleted()) {
                    results.add(object.mapEncode());
                }
                // Send the response back to the Console.
                queryResponse(handle, results, "_data");
            } else {
                // Look up QmfAgentData objects by the SchemaClassId obtained from the query
                // This is implemented by a linear search and allows searches with only the className specified.
                // Linear searches clearly don't scale brilliantly, but the number of QmfAgentData objects managed
                // by an Agent is generally fairly small, so it should be OK. Note that this is the same approach
                // taken by the C++ broker ManagementAgent, so if it's a problem here........
                // N.B. the results list declared here is a generic List of Objects. We *must* only pass a List of
                // Map to queryResponse(), but conversely if the response items are sortable we need to sort them
                // before doing mapEncode(). Unfortunately we don't know if the items are sortable a priori so
                // we either add a Map or we add a QmfAgentData, then sort then mapEncode() each item. I'm not
                // sure of a more elegant way to do this without creating two lists, which might not be so bad
                // but we don't know the size of the list a priori either.
                List results = new ArrayList(_objectIndex.size());
                // It's unlikely that evaluating this query will return a mixture of sortable and notSortable
                // QmfAgentData objects, but it's best to check if that has occurred as accidentally passing a
                // List of QmfAgentData instead of a List of Map to queryResponse() will break things.
                boolean sortable = false;
                boolean notSortable = false;
                for (QmfAgentData object : _objectIndex.values()) {
                    if (!object.isDeleted() && query.evaluate(object)) {
                        if (object.isSortable()) {
                            // If QmfAgentData is marked sortable we add the QmfAgentData object to the List
                            // so we can sort first before mapEncoding.
                            results.add(object);
                            sortable = true;
                        } else {
                            // If QmfAgentData is not marked sortable we mapEncode immediately and add the Map to List.
                            results.add(object.mapEncode());
                            notSortable = true;
                        }
                    }
                }
                // results List to avoid sending unconvertable data. Hopefully this condition should never occur.
                if (sortable && notSortable) {
                    _log.info("Query resulted in inconsistent mixture of sortable and non-sortable data.");
                    results.clear();
                } else if (sortable) {
                    Collections.sort(results);
                    int length = results.size();
                    for (int i = 0; i < length; i++) {
                        QmfAgentData object = (QmfAgentData) results.get(i);
                        results.set(i, object.mapEncode());
                    }
                }
                // Send the response back to the Console.
                queryResponse(handle, results, "_data");
            }
        }
    } else {
        raiseException(handle, "Query for _what => '" + target + "' not supported");
        return;
    }
}

Example 33 with Agent

use of org.apache.qpid.qmf2.console.Agent in project qpid by apache.

the class Agent method registerObjectClass.

/**
 * Register a schema for an object class with the Agent.
 * <p>
 * The Agent must have a registered schema for an object class before it can handle objects of that class.
 *
 * @param schema the SchemaObjectClass to be registered
 */
public final void registerObjectClass(final SchemaObjectClass schema) {
    SchemaClassId classId = schema.getClassId();
    _schemaCache.put(classId, schema);
}

Example 34 with Agent

use of org.apache.qpid.qmf2.console.Agent in project qpid by apache.

the class Agent method registerEventClass.

/**
 * Register a schema for an event class with the Agent.
 * <p>
 * The Agent must have a registered schema for an event class before it can handle events of that class.
 *
 * @param schema the SchemaEventClass to be registered
 */
public final void registerEventClass(final SchemaEventClass schema) {
    SchemaClassId classId = schema.getClassId();
    _schemaCache.put(classId, schema);
}

Example 35 with Agent

use of org.apache.qpid.qmf2.console.Agent in project qpid by apache.

the class Console method getObjects.

/**
 * Perform a query for QmfConsoleData objects. Returns a list (possibly empty) of matching objects.
 * If replyHandle is null this method will block until the agent replies, or the timeout expires.
 * Once the timeout expires, all data retrieved to date is returned. If replyHandle is non-null an
 * asynchronous request is performed
 *
 * @param agent the Agent being queried
 * @param query the ObjectId or SchemaClassId being queried for.
 * @param replyHandle the correlation handle used to tie asynchronous method requests with responses
 * @param timeout the time to wait for a reply from the Agent, a value of -1 means use the default timeout
 * @return a List of QMF Objects describing that class
 */
private List<QmfConsoleData> getObjects(final Agent agent, final QmfData query, final String replyHandle, int timeout) {
    String agentName = agent.getName();
    timeout = (timeout < 1) ? _replyTimeout : timeout;
    List<QmfConsoleData> results = Collections.emptyList();
    try {
        Destination destination = (replyHandle == null) ? _replyAddress : _asyncReplyAddress;
        MapMessage request = _syncSession.createMapMessage();
        request.setJMSReplyTo(destination);
        request.setJMSCorrelationID(replyHandle);
        request.setStringProperty("x-amqp-0-10.app-id", "qmf2");
        request.setStringProperty("method", "request");
        request.setStringProperty("qmf.opcode", "_query_request");
        request.setStringProperty("qpid.subject", agentName);
        // Create a QMF Query for an "OBJECT" target using either a schema ID or object ID
        String queryType = (query instanceof SchemaClassId) ? "_schema_id" : "_object_id";
        request.setObject("_what", "OBJECT");
        request.setObject(queryType, query.mapEncode());
        // it would be somewhat unfortunate if their response got interleaved with ours!!
        synchronized (this) {
            _requester.send(request);
            if (replyHandle == null) {
                boolean lastResult = true;
                ArrayList<QmfConsoleData> partials = new ArrayList<QmfConsoleData>();
                do {
                    // Wrap in a do/while loop to cater for the case where the Agent may send partial results.
                    Message response = _responder.receive(timeout * 1000);
                    if (response == null) {
                        _log.info("No response received in getObjects()");
                        return partials;
                    }
                    lastResult = !response.propertyExists("partial");
                    if (AMQPMessage.isAMQPList(response)) {
                        List<Map> mapResults = AMQPMessage.getList(response);
                        partials.ensureCapacity(partials.size() + mapResults.size());
                        for (Map content : mapResults) {
                            partials.add(new QmfConsoleData(content, agent));
                        }
                    } else if (AMQPMessage.isAMQPMap(response)) {
                    // Error responses are returned as MapMessages, though they are being ignored here.
                    // QmfData exception = new QmfData(AMQPMessage.getMap(response));
                    // System.out.println(agentName + " " + exception.getStringValue("error_text"));
                    } else {
                        _log.info("getObjects() Received response message in incorrect format");
                    }
                } while (!lastResult);
                results = partials;
            }
        }
    } catch (JMSException jmse) {
        _log.info("JMSException {} caught in getObjects()", jmse.getMessage());
    }
    return results;
}