GroupNode findOrCreateSystemNode(MonitorEngine engine) {
ManagedNode infNode = nodeService.findByPath(ManagedNode.INFRASTRUCTURE_PATH);
// 兼容手工创建时，引擎资源节点存在对应管理节点的情况
// 创建 引擎系统 群组，其中存放监控服务器，监控引擎，相关redis/mysql/nginx等自带应用
GroupNode engineSystemGroupNode;
try {
engineSystemGroupNode = (GroupNode) nodeService.findByPath(engine.getSystemPath());
} catch (IllegalArgumentException e) {
// Not found exception
engineSystemGroupNode = new GroupNode();
engineSystemGroupNode.cascadeCreating();
engineSystemGroupNode.setPath(engine.getSystemPath());
if (engine.isDefault()) {
engineSystemGroupNode.setLabel("缺省监控系统");
} else {
engineSystemGroupNode.setLabel(engine.getLabel() + "系统");
}
engineSystemGroupNode.setIcon("monitor_system");
engineSystemGroupNode.setComment("Auto created system group node for " + engine.getLabel());
try {
nodeService.create(infNode, engineSystemGroupNode);
} catch (NodeException ex) {
throw new ApplicationContextException("Can't auto create engine group node", ex);
}
}
return engineSystemGroupNode;
}
@Override
public MonitorEngine register(MonitorEngine engine) throws ResourceException {
// 先执行自动批准动作
performApproval(engine);
// 如果是从监控服务器下载下来的引擎，关联了相应的engine id，则直接更新
if (StringUtils.isNotBlank(engine.getEngineId())) {
MonitorEngine legacy = findByEngineId(engine.getEngineId());
// id/name/label 保留数据库中的值
engine.setId(legacy.getId());
engine.setName(legacy.getName());
engine.setLabel(legacy.getLabel());
// properties 合并
if (legacy.getProperties() != null) {
if (engine.getProperties() == null) {
engine.setProperties(legacy.getProperties());
} else {
engine.getProperties().putAll(legacy.getProperties());
}
}
return update(legacy, engine);
} else if (isDefault(engine)) { // 还有一种常见情况，就是缺省引擎（与监控服务器安装在同一个地址)，而后没有配置engineId
MonitorEngine defaultEngine = getRepository().findDefaultEngine();
engine.setEngineId(defaultEngine.getEngineId());
return update(defaultEngine, engine);
} else {
// 否则创建一个新的实例
return create(engine);
}
}
void createEngineNode(MonitorEngine engine, GroupNode engineSystemGroupNode) {
// 在引擎系统中，添加引擎自身这个节点
String enginePath = engine.getSystemPath() + "/engine";
ResourceNode engineNode;
try {
nodeService.findByPath(enginePath);
} catch (Exception e) {
engineNode = new ResourceNode();
// 说明该节点是在创建引擎后被级联自动创建的
engineNode.cascadeCreating();
engineNode.setResource(engine);
engineNode.setPath(enginePath);
engineNode.setLabel(engine.getLabel());
engineNode.setIcon("monitor_engine");
engineNode.setState(State.Running);
engineNode.setComment("Auto created engine node for " + engine.getLabel());
try {
nodeService.create(engineSystemGroupNode, engineNode);
} catch (NodeException ex) {
throw new ApplicationContextException("Can't auto create engine node", ex);
}
}
}