/**
* Cancel grant on a node
*
* @param nodeName the node the grant is on
* @param sessionId the session the grant was given to
* @param requestId the request this grant satisfied
*/
public void cancelGrant(String nodeName, String sessionId, int requestId) {
ClusterNode node = nameToNode.get(nodeName);
if (node == null) {
LOG.warn("Canceling grant for non-existent node: " + nodeName);
return;
}
synchronized (node) {
if (node.deleted) {
LOG.warn("Canceling grant for deleted node: " + nodeName);
return;
}
String hoststr = node.getClusterNodeInfo().getAddress().getHost();
if (!canAllowNode(hoststr)) {
LOG.warn("Canceling grant for excluded node: " + hoststr);
return;
}
ResourceRequestInfo req = node.getRequestForGrant(sessionId, requestId);
if (req != null) {
ResourceRequest unitReq = Utilities.getUnitResourceRequest(req.getType());
boolean previouslyRunnable = node.checkForGrant(unitReq, resourceLimit);
node.cancelGrant(sessionId, requestId);
loadManager.decrementLoad(req.getType());
if (!previouslyRunnable && node.checkForGrant(unitReq, resourceLimit)) {
RunnableIndices r = typeToIndices.get(req.getType());
if (!faultManager.isBlacklisted(node.getName(), req.getType())) {
r.addRunnable(node);
}
}
}
}
}
/**
* Add a grant to a node
*
* @param node the node the grant is on
* @param sessionId the session the grant is given to
* @param req the request this grant satisfies
* @return true if the grant can be added to the node, false otherwise
*/
public boolean addGrant(ClusterNode node, String sessionId, ResourceRequestInfo req) {
synchronized (node) {
if (node.deleted) {
return false;
}
if (!node.checkForGrant(Utilities.getUnitResourceRequest(req.getType()), resourceLimit)) {
return false;
}
node.addGrant(sessionId, req);
loadManager.incrementLoad(req.getType());
hostsToSessions.get(node).add(sessionId);
if (!node.checkForGrant(Utilities.getUnitResourceRequest(req.getType()), resourceLimit)) {
RunnableIndices r = typeToIndices.get(req.getType());
r.deleteRunnable(node);
}
}
return true;
}
/**
* Register a new application on the node
*
* @param node the node to register on
* @param type the type of an application
* @param appInfo the appInfo string for the application
*/
protected void addAppToNode(ClusterNode node, ResourceType type, String appInfo) {
synchronized (node) {
// Update primary index.
Map<ResourceType, String> apps = nameToApps.get(node.getName());
apps.put(type, appInfo);
// Update runnable indices.
for (Map.Entry<ResourceType, RunnableIndices> entry : typeToIndices.entrySet()) {
if (type.equals(entry.getKey())) {
if (node.checkForGrant(Utilities.getUnitResourceRequest(type), resourceLimit)) {
RunnableIndices r = entry.getValue();
r.addRunnable(node);
}
}
}
}
}
/**
* Update the runnable status of a node based on resources available. This checks both resources
* and slot availability.
*
* @param node The node
*/
private void updateRunnability(ClusterNode node) {
synchronized (node) {
for (Map.Entry<ResourceType, RunnableIndices> entry : typeToIndices.entrySet()) {
ResourceType type = entry.getKey();
RunnableIndices r = entry.getValue();
ResourceRequest unitReq = Utilities.getUnitResourceRequest(type);
boolean currentlyRunnable = r.hasRunnable(node);
boolean shouldBeRunnable = node.checkForGrant(unitReq, resourceLimit);
if (currentlyRunnable && !shouldBeRunnable) {
LOG.info("Node " + node.getName() + " is no longer " + type + " runnable");
r.deleteRunnable(node);
} else if (!currentlyRunnable && shouldBeRunnable) {
LOG.info("Node " + node.getName() + " is now " + type + " runnable");
r.addRunnable(node);
}
}
}
}
/**
* Add a node to be managed.
*
* @param node Node to be managed
* @param resourceInfos Mapping of the resource type to runnable indices
*/
protected void addNode(ClusterNode node, Map<ResourceType, String> resourceInfos) {
synchronized (node) {
// 1: primary
nameToNode.put(node.getName(), node);
faultManager.addNode(node.getName(), resourceInfos.keySet());
nameToApps.put(node.getName(), resourceInfos);
hostsToSessions.put(node, new HashSet<String>());
setAliveDeadMetrics();
// 2: update runnable indices
for (Map.Entry<ResourceType, RunnableIndices> entry : typeToIndices.entrySet()) {
ResourceType type = entry.getKey();
if (resourceInfos.containsKey(type)) {
if (node.checkForGrant(Utilities.getUnitResourceRequest(type), resourceLimit)) {
RunnableIndices r = entry.getValue();
r.addRunnable(node);
}
}
}
}
}