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javaJmx.js
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javaJmx.js
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var java = require("java"),
util = require("util"),
EventEmitter = require("events").EventEmitter,
checkError = require("./helpers/error").checkError,
jmxServiceUrlBuilder = require("./adapters/helpers/jmxServiceUrlBuilder"),
MBeanServerConnection = require("./adapters/mbeanServerConnection"),
conversions = require("./adapters/helpers/conversions");
function JavaJmx(serviceOrHost, port, protocol, urlPath) {
var self = this;
function subscribeTo(obj) {
obj.on("connect", function() {
self.emit("connect");
});
obj.on("disconnect", function() {
self.emit("disconnect");
});
obj.on("error", function(err) {
self.emit("error", err);
if (/java\.net\.ConnectException: Connection refused/.test(err)) {
self.mbeanServerConnection.close();
}
});
}
EventEmitter.call(this);
this.mbeanServerConnection = new MBeanServerConnection();
subscribeTo(this.mbeanServerConnection);
}
util.inherits(JavaJmx, EventEmitter);
JavaJmx.prototype.JmxServiceUrl = function(serviceOrHost, port, protocol, urlPath) {
return jmxServiceUrlBuilder(serviceOrHost, port, protocol, urlPath);
};
JavaJmx.prototype.connect = function(jmxServiceUrl) {
this.mbeanServerConnection.connect(jmxServiceUrl);
};
JavaJmx.prototype.disconnect = function() {
this.mbeanServerConnection.close();
};
// ISSUE-6 / EMB - Added getAttributes function
JavaJmx.prototype.getAttributes = function(mbean, attributeNames, callback) {
function attributesArray2js(attributes, callback) {
var values = [];
attributes.toArray(function(err, attributesAr) {
if (checkError(err, self)) return;
attributesAr.forEach(function(attribute) {
values.push(attribute.getValueSync());
});
callback(values);
});
}
var self = this;
self.mbeanServerConnection.queryMBeans(null, mbean, function(instance) {
instance.getObjectName(function(err, objectName) {
if (checkError(err, self)) return;
self.mbeanServerConnection.getAttributes(objectName, attributeNames, function(attributes) {
attributesArray2js(attributes, callback);
});
});
});
};
JavaJmx.prototype.getAttribute = function(mbean, attributeName, callback) {
var self = this;
self.mbeanServerConnection.queryMBeans(null, mbean, function(instance) {
instance.getObjectName(function(err, objectName) {
if (checkError(err, self)) return;
self.mbeanServerConnection.getAttribute(objectName, attributeName, callback);
});
});
};
JavaJmx.prototype.getDefaultDomain = function(callback) {
this.mbeanServerConnection.getDefaultDomain(callback);
};
JavaJmx.prototype.getDomains = function(callback) {
this.mbeanServerConnection.getDomains(callback);
};
JavaJmx.prototype.getMBeanCount = function(callback) {
this.mbeanServerConnection.getMBeanCount(callback);
};
JavaJmx.prototype.invoke = function(mbean, methodName, params, signatureOrCallback, callback) {
function generateJavaSignature(params) {
var self = this;
var signature = [];
params.forEach(function(param) {
try {
signature.push(conversions.v8ToJavaClass(param));
} catch(err) {
checkError(err, self);
}
});
return signature;
}
function jsParams2JavaParams(params, signature) {
var javaParams = [];
signature.forEach(function(className) {
var value = params.shift();
if (typeof value.getClass !== "function") {
if (!conversions.isJavaPrimitiveClass(className)) {
// TODO: make this async
value = java.newInstanceSync(className, value);
}
}
javaParams.push(value);
});
return javaParams;
}
var self = this;
var signature;
params = params || [];
if (typeof signatureOrCallback === "function") {
callback = signatureOrCallback;
signature = generateJavaSignature.call(self, params);
} else {
signature = signatureOrCallback || generateJavaSignature.call(self, params);
}
var javaParams = jsParams2JavaParams.call(self, params, signature);
self.mbeanServerConnection.queryMBeans(null, mbean, function(instance, end_callback) {
instance.getObjectName(function(err, objectName) {
if (checkError(err, self)) return;
self.mbeanServerConnection.invoke(objectName, methodName, javaParams, signature, callback);
});
end_callback();
});
};
JavaJmx.prototype.listMBeans = function(callback) {
var self = this;
var mbeans = [];
self.mbeanServerConnection.queryMBeans(null, null, function(instance, end_callback) {
instance.getObjectName(function(err, objectName) {
if (checkError(err, self)) { end_callback(); return; }
objectName.getCanonicalName(function(err, str) {
if (checkError(err, self)) { end_callback(); return; }
mbeans.push(str);
end_callback();
});
});
}, function() {
callback(mbeans);
});
};
JavaJmx.prototype.setAttribute = function(mbean, attributeName, value, classNameOrCallback, callback) {
function setAttribute(mbean, attributeName, value, callback) {
java.newInstance("javax.management.Attribute", attributeName, value, function(err, attribute) {
if (checkError(err, self)) return;
self.mbeanServerConnection.queryMBeans(null, mbean, function(instance) {
instance.getObjectName(function(err, objectName) {
if (checkError(err, self)) return;
self.mbeanServerConnection.setAttribute(objectName, attribute, callback);
});
});
});
}
var self = this;
if (typeof classNameOrCallback === "string" && !conversions.isJavaPrimitiveClass(classNameOrCallback)) {
var newInstanceArgs = [ classNameOrCallback ];
newInstanceArgs = newInstanceArgs.concat(value);
newInstanceArgs.push(function(err, obj) {
if (checkError(err, self)) return;
setAttribute.call(self, mbean, attributeName, obj, callback);
});
java.newInstance.apply(java, newInstanceArgs);
} else {
if (typeof callback === "undefined" && typeof classNameOrCallback === "function") {
callback = classNameOrCallback;
}
setAttribute.call(self, mbean, attributeName, value, callback);
}
};
JavaJmx.prototype.setCredentials = function(username, password) {
this.mbeanServerConnection.setCredentials(username, password);
};
module.exports = JavaJmx;