Examples with NodeType com.yahoo.vdslib.state.NodeType used on opensource projects

Example 6 with NodeType

use of com.yahoo.vdslib.state.NodeType in project vespa by vespa-engine.

the class RpcServer method handleRpcRequests.

public boolean handleRpcRequests(ContentCluster cluster, ClusterState systemState, NodeStateOrHostInfoChangeHandler changeListener, NodeAddedOrRemovedListener addedListener) {
    boolean handledAnyRequests = false;
    if (!isConnected()) {
        long time = timer.getCurrentTimeInMillis();
        try {
            connect();
        } catch (ListenFailedException e) {
            if (!e.getMessage().equals(lastConnectError) || time - lastConnectErrorTime > 60 * 1000) {
                lastConnectError = e.getMessage();
                lastConnectErrorTime = time;
                log.log(LogLevel.WARNING, "Failed to bind RPC server to port " + port + ": " + e.getMessage());
            }
        } catch (Exception e) {
            if (!e.getMessage().equals(lastConnectError) || time - lastConnectErrorTime > 60 * 1000) {
                lastConnectError = e.getMessage();
                lastConnectErrorTime = time;
                log.log(LogLevel.WARNING, "Failed to initailize RPC server socket: " + e.getMessage());
            }
        }
    }
    for (int j = 0; j < 10; ++j) {
        // Max perform 10 RPC requests per cycle.
        Request req;
        synchronized (monitor) {
            if (rpcRequests.isEmpty())
                break;
            Iterator<Request> it = rpcRequests.iterator();
            req = it.next();
            it.remove();
            handledAnyRequests = true;
        }
        try {
            if (req.methodName().equals("getMaster")) {
                log.log(LogLevel.DEBUG, "Resolving RPC getMaster request");
                Integer master = masterHandler.getMaster();
                String masterReason = masterHandler.getMasterReason();
                req.returnValues().add(new Int32Value(master == null ? -1 : master));
                req.returnValues().add(new StringValue(masterReason == null ? "No reason given" : masterReason));
                req.returnRequest();
                continue;
            }
            if (!masterHandler.isMaster()) {
                throw new IllegalStateException("Refusing to answer RPC calls as we are not the master fleetcontroller.");
            }
            if (req.methodName().equals("getNodeList")) {
                log.log(LogLevel.DEBUG, "Resolving RPC getNodeList request");
                List<String> slobrok = new ArrayList<String>();
                List<String> rpc = new ArrayList<String>();
                for (NodeInfo node : cluster.getNodeInfo()) {
                    String s1 = node.getSlobrokAddress();
                    String s2 = node.getRpcAddress();
                    assert (s1 != null);
                    slobrok.add(s1);
                    rpc.add(s2 == null ? "" : s2);
                }
                req.returnValues().add(new StringArray(slobrok.toArray(new String[slobrok.size()])));
                req.returnValues().add(new StringArray(rpc.toArray(new String[rpc.size()])));
                req.returnRequest();
            } else if (req.methodName().equals("getSystemState")) {
                log.log(LogLevel.DEBUG, "Resolving RPC getSystemState request");
                req.returnValues().add(new StringValue(""));
                req.returnValues().add(new StringValue(systemState.toString(true)));
                req.returnRequest();
            } else if (req.methodName().equals("getNodeState")) {
                log.log(LogLevel.DEBUG, "Resolving RPC getNodeState request");
                NodeType nodeType = NodeType.get(req.parameters().get(0).asString());
                int nodeIndex = req.parameters().get(1).asInt32();
                Node node = new Node(nodeType, nodeIndex);
                // First parameter is current state in system state
                NodeState ns = systemState.getNodeState(node);
                req.returnValues().add(new StringValue(systemState.getNodeState(node).serialize()));
                // Second parameter is state node is reporting
                NodeInfo nodeInfo = cluster.getNodeInfo(node);
                if (nodeInfo == null)
                    throw new RuntimeException("No node " + node + " exists in cluster " + cluster.getName());
                NodeState fromNode = nodeInfo.getReportedState();
                req.returnValues().add(new StringValue(fromNode == null ? "unknown" : fromNode.serialize()));
                // Third parameter is state node has been requested to be in
                req.returnValues().add(new StringValue(nodeInfo.getWantedState().serialize()));
                // Fourth parameter is RPC address of node
                req.returnValues().add(new StringValue(nodeInfo.getRpcAddress() == null ? "" : nodeInfo.getRpcAddress()));
                req.returnRequest();
            } else if (req.methodName().equals("setNodeState")) {
                String slobrokAddress = req.parameters().get(0).asString();
                int lastSlash = slobrokAddress.lastIndexOf('/');
                int nextButLastSlash = slobrokAddress.lastIndexOf('/', lastSlash - 1);
                if (lastSlash == -1 || nextButLastSlash == -1) {
                    throw new IllegalStateException("Invalid slobrok address '" + slobrokAddress + "'.");
                }
                NodeType nodeType = NodeType.get(slobrokAddress.substring(nextButLastSlash + 1, lastSlash));
                Integer nodeIndex = Integer.valueOf(slobrokAddress.substring(lastSlash + 1));
                NodeInfo node = cluster.getNodeInfo(new Node(nodeType, nodeIndex));
                if (node == null)
                    throw new IllegalStateException("Cannot set wanted state of node " + new Node(nodeType, nodeIndex) + ". Index does not correspond to a configured node.");
                NodeState nodeState = NodeState.deserialize(nodeType, req.parameters().get(1).asString());
                if (nodeState.getDescription().equals("") && !nodeState.getState().equals(State.UP) && !nodeState.getState().equals(State.RETIRED)) {
                    nodeState.setDescription("Set by remote RPC client");
                }
                NodeState oldState = node.getUserWantedState();
                String message = (nodeState.getState().equals(State.UP) ? "Clearing wanted nodeState for node " + node : "New wantedstate '" + nodeState.toString() + "' stored for node " + node);
                if (!oldState.equals(nodeState) || !oldState.getDescription().equals(nodeState.getDescription())) {
                    if (!nodeState.getState().validWantedNodeState(nodeType)) {
                        throw new IllegalStateException("State " + nodeState.getState() + " can not be used as wanted state for node of type " + nodeType);
                    }
                    node.setWantedState(nodeState);
                    changeListener.handleNewWantedNodeState(node, nodeState);
                } else {
                    message = "Node " + node + " already had wanted state " + nodeState.toString();
                    log.log(LogLevel.DEBUG, message);
                }
                req.returnValues().add(new StringValue(message));
                req.returnRequest();
                if (nodeState.getState() == State.UP && node.getPrematureCrashCount() > 0) {
                    log.log(LogLevel.INFO, "Clearing premature crash count of " + node.getPrematureCrashCount() + " as wanted state was set to up");
                    node.setPrematureCrashCount(0);
                }
            }
        } catch (Exception e) {
            if (log.isLoggable(LogLevel.DEBUG)) {
                StringWriter sw = new StringWriter();
                e.printStackTrace(new PrintWriter(sw));
                log.log(LogLevel.DEBUG, "Failed RPC Request: " + sw);
            }
            String errorMsg = e.getMessage();
            if (errorMsg == null) {
                errorMsg = e.toString();
            }
            req.setError(ErrorCode.METHOD_FAILED, errorMsg);
            req.returnRequest();
        }
    }
    return handledAnyRequests;
}