/// <summary>Build a JSON entry from the parameters.</summary>
/// <remarks>Build a JSON entry from the parameters. This is public for testing.</remarks>
/// <param name="writer">destination</param>
/// <param name="loggerName">logger name</param>
/// <param name="timeStamp">time_t value</param>
/// <param name="level">level string</param>
/// <param name="threadName">name of the thread</param>
/// <param name="message">rendered message</param>
/// <param name="ti">nullable thrown information</param>
/// <returns>the writer</returns>
/// <exception cref="System.IO.IOException">on any problem</exception>
public virtual TextWriter ToJson(TextWriter writer, string loggerName, long timeStamp
, string level, string threadName, string message, ThrowableInformation ti)
{
JsonGenerator json = factory.CreateJsonGenerator(writer);
json.WriteStartObject();
json.WriteStringField(Name, loggerName);
json.WriteNumberField(Time, timeStamp);
DateTime date = Extensions.CreateDate(timeStamp);
json.WriteStringField(Date, dateFormat.Format(date));
json.WriteStringField(Level, level);
json.WriteStringField(Thread, threadName);
json.WriteStringField(Message, message);
if (ti != null)
{
//there is some throwable info, but if the log event has been sent over the wire,
//there may not be a throwable inside it, just a summary.
Exception thrown = ti.GetThrowable();
string eclass = (thrown != null) ? thrown.GetType().FullName : string.Empty;
json.WriteStringField(ExceptionClass, eclass);
string[] stackTrace = ti.GetThrowableStrRep();
json.WriteArrayFieldStart(Stack);
foreach (string row in stackTrace)
{
json.WriteString(row);
}
json.WriteEndArray();
}
json.WriteEndObject();
json.Flush();
json.Close();
return(writer);
}
// --------------------------------------------------------- Private Methods
/// <exception cref="System.IO.IOException"/>
private void ListBeans(JsonGenerator jg, ObjectName qry, string attribute, HttpServletResponse
response)
{
Log.Debug("Listing beans for " + qry);
ICollection <ObjectName> names = null;
names = mBeanServer.QueryNames(qry, null);
jg.WriteArrayFieldStart("beans");
IEnumerator <ObjectName> it = names.GetEnumerator();
while (it.HasNext())
{
ObjectName oname = it.Next();
MBeanInfo minfo;
string code = string.Empty;
object attributeinfo = null;
try
{
minfo = mBeanServer.GetMBeanInfo(oname);
code = minfo.GetClassName();
string prs = string.Empty;
try
{
if ("org.apache.commons.modeler.BaseModelMBean".Equals(code))
{
prs = "modelerType";
code = (string)mBeanServer.GetAttribute(oname, prs);
}
if (attribute != null)
{
prs = attribute;
attributeinfo = mBeanServer.GetAttribute(oname, prs);
}
}
catch (AttributeNotFoundException e)
{
// If the modelerType attribute was not found, the class name is used
// instead.
Log.Error("getting attribute " + prs + " of " + oname + " threw an exception", e);
}
catch (MBeanException e)
{
// The code inside the attribute getter threw an exception so log it,
// and fall back on the class name
Log.Error("getting attribute " + prs + " of " + oname + " threw an exception", e);
}
catch (RuntimeException e)
{
// For some reason even with an MBeanException available to them
// Runtime exceptionscan still find their way through, so treat them
// the same as MBeanException
Log.Error("getting attribute " + prs + " of " + oname + " threw an exception", e);
}
catch (ReflectionException e)
{
// This happens when the code inside the JMX bean (setter?? from the
// java docs) threw an exception, so log it and fall back on the
// class name
Log.Error("getting attribute " + prs + " of " + oname + " threw an exception", e);
}
}
catch (InstanceNotFoundException)
{
//Ignored for some reason the bean was not found so don't output it
continue;
}
catch (IntrospectionException e)
{
// This is an internal error, something odd happened with reflection so
// log it and don't output the bean.
Log.Error("Problem while trying to process JMX query: " + qry + " with MBean " +
oname, e);
continue;
}
catch (ReflectionException e)
{
// This happens when the code inside the JMX bean threw an exception, so
// log it and don't output the bean.
Log.Error("Problem while trying to process JMX query: " + qry + " with MBean " +
oname, e);
continue;
}
jg.WriteStartObject();
jg.WriteStringField("name", oname.ToString());
jg.WriteStringField("modelerType", code);
if ((attribute != null) && (attributeinfo == null))
{
jg.WriteStringField("result", "ERROR");
jg.WriteStringField("message", "No attribute with name " + attribute + " was found."
);
jg.WriteEndObject();
jg.WriteEndArray();
jg.Close();
response.SetStatus(HttpServletResponse.ScNotFound);
return;
}
if (attribute != null)
{
WriteAttribute(jg, attribute, attributeinfo);
}
else
{
MBeanAttributeInfo[] attrs = minfo.GetAttributes();
for (int i = 0; i < attrs.Length; i++)
{
WriteAttribute(jg, oname, attrs[i]);
}
}
jg.WriteEndObject();
}
jg.WriteEndArray();
}
/// <summary>Process a GET request for the specified resource.</summary>
/// <param name="request">The servlet request we are processing</param>
/// <param name="response">The servlet response we are creating</param>
protected override void DoGet(HttpServletRequest request, HttpServletResponse response
)
{
string jsonpcb = null;
PrintWriter writer = null;
try
{
if (!IsInstrumentationAccessAllowed(request, response))
{
return;
}
JsonGenerator jg = null;
try
{
writer = response.GetWriter();
response.SetContentType("application/json; charset=utf8");
response.SetHeader(AccessControlAllowMethods, "GET");
response.SetHeader(AccessControlAllowOrigin, "*");
JsonFactory jsonFactory = new JsonFactory();
jg = jsonFactory.CreateJsonGenerator(writer);
jg.Disable(JsonGenerator.Feature.AutoCloseTarget);
jg.UseDefaultPrettyPrinter();
jg.WriteStartObject();
if (mBeanServer == null)
{
jg.WriteStringField("result", "ERROR");
jg.WriteStringField("message", "No MBeanServer could be found");
jg.Close();
Log.Error("No MBeanServer could be found.");
response.SetStatus(HttpServletResponse.ScNotFound);
return;
}
// query per mbean attribute
string getmethod = request.GetParameter("get");
if (getmethod != null)
{
string[] splitStrings = getmethod.Split("\\:\\:");
if (splitStrings.Length != 2)
{
jg.WriteStringField("result", "ERROR");
jg.WriteStringField("message", "query format is not as expected.");
jg.Close();
response.SetStatus(HttpServletResponse.ScBadRequest);
return;
}
ListBeans(jg, new ObjectName(splitStrings[0]), splitStrings[1], response);
jg.Close();
return;
}
// query per mbean
string qry = request.GetParameter("qry");
if (qry == null)
{
qry = "*:*";
}
ListBeans(jg, new ObjectName(qry), null, response);
}
finally
{
if (jg != null)
{
jg.Close();
}
if (writer != null)
{
writer.Close();
}
}
}
catch (IOException e)
{
Log.Error("Caught an exception while processing JMX request", e);
response.SetStatus(HttpServletResponse.ScInternalServerError);
}
catch (MalformedObjectNameException e)
{
Log.Error("Caught an exception while processing JMX request", e);
response.SetStatus(HttpServletResponse.ScBadRequest);
}
finally
{
if (writer != null)
{
writer.Close();
}
}
}