HealthCenter

```
public interface HealthCenter
```
This class represents a connection to either a live application or data loaded from a file. The class provdes access to all the different types of data available within Health Center, as well as providing control functions for limiting the amount of data that is returned.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`clearTimeThresholds()` Clears any time thresholds that were set on the Health Center data.
`void`	`endMonitoring()` Ends the monitoring of the application, although the agent remains running to allow future connections.
`long`	`getAmountOfDataReceived()` Gets the number of bytes read so far by the Health Center.
`ClassesData`	`getClassesData()` Gets the classes data that is associated with this Health Center connection.
`CpuData`	`getCpuData()` Gets the CPU data that is associated with this Health Center connection.
`java.util.Date`	`getEarliestMonitoredDataTime()` Gets the time of the first piece of monitored data.
`EnvironmentData`	`getEnvironmentData()` Gets the environment data that is associated with this Health Center connection.
`GCData`	`getGCData()` Gets the garbage collection data that is associated with this Health Center connection.
`IOData`	`getIOData()` Gets the I/O data that is associated with this Health Center connection.
`java.util.Date`	`getLastUpdated()` Gets the time when data was last received (variable).
`java.util.Date`	`getLatestMonitoredDataTime()` Gets the time of the latest piece of monitored data.
`LockingData`	`getLockingData()` Gets the locking data that is associated with this Health Center connection.
`MethodTraceData`	`getMethodTraceData()` Gets the method trace data that is associated with this Health Center connection.
`NativeMemoryData`	`getNativeMemoryData()` Gets the native memory data that is associated with this Health Center connection.
`HealthCenterPreferences`	`getPreferences()` Gets a HealthCenterPreferences object, on which preferences can be set.
`ProfilingData`	`getProfilingData()` Gets the profiling data that is associated with this Health Center connection.
`ThreadsData`	`getThreadsData()` Gets the threads data that is associated with this Health Center connection.
`VMControl`	`getVMControl()` Gets the VMControl object that is associated with this Health Center connection.
`boolean`	`isConnectionAlive()` Whether the connection is currently connected.
`void`	`resetData()` Clears all current Health Center data.
`void`	`saveData(java.io.File name)` Saves the current Health Center data to disk.
`void`	`setFineGrainTimeThresholds(int lowerThreshold, int upperThreshold)` Sets lower and upper cut-off thresholds for the Health Center data.
`void`	`setTimeThreshold(int lowerThreshold)` Sets a lower cut-off threshold for the Health Center data.
`void`	`setTimeThresholds(int lowerThreshold, int upperThreshold)` Sets lower and upper cut-off thresholds for the Health Center data.

- Method Detail
  - setTimeThreshold
```
void setTimeThreshold(int lowerThreshold)
```
    Sets a lower cut-off threshold for the Health Center data. Any data from before this time is not returned on any calls that return data from Health Center.
    
    Parameters:
    lowerThreshold - the threshold, in minutes from application start.
  - setTimeThresholds
```
void setTimeThresholds(int lowerThreshold,
                     int upperThreshold)
```
    Sets lower and upper cut-off thresholds for the Health Center data. Any calls that return data from the Health Center return only data that is inside this time window.
    
    Parameters:
    lowerThreshold - the lower threshold, in minutes from application start.
    upperThreshold - the upper threshold, in minutes from application start.
  - setFineGrainTimeThresholds
```
void setFineGrainTimeThresholds(int lowerThreshold,
                              int upperThreshold)
```
    Sets lower and upper cut-off thresholds for the Health Center data. Any calls that return data from the Health Center return only data that is inside this time window.
    
    Parameters:
    lowerThreshold - the lower threshold, in milliseconds from application start.
    upperThreshold - the upper threshold, in milliseconds from application start.
  - clearTimeThresholds
```
void clearTimeThresholds()
```
    Clears any time thresholds that were set on the Health Center data.
  - getIOData
```
IOData getIOData()
```
    Gets the I/O data that is associated with this Health Center connection.
    
    Returns:
    an IOData object that allows access to the I/O data.
  - getClassesData
```
ClassesData getClassesData()
```
    Gets the classes data that is associated with this Health Center connection.
    
    Returns:
    a ClassesData object that allows access to the classes data.
  - getCpuData
```
CpuData getCpuData()
```
    Gets the CPU data that is associated with this Health Center connection.
    
    Returns:
    a CpuData object that allows access to the CPU data.
  - getGCData
```
GCData getGCData()
```
    Gets the garbage collection data that is associated with this Health Center connection.
    
    Returns:
    a GCData object that allows access to the GC data.
  - getMethodTraceData
```
MethodTraceData getMethodTraceData()
```
    Gets the method trace data that is associated with this Health Center connection.
    
    Returns:
    a MethodTraceData object that allows access to the method trace data.
  - getNativeMemoryData
```
NativeMemoryData getNativeMemoryData()
```
    Gets the native memory data that is associated with this Health Center connection.
    
    Returns:
    a NativeMemoryData object that allows access to the native memory data.
  - getEnvironmentData
```
EnvironmentData getEnvironmentData()
```
    Gets the environment data that is associated with this Health Center connection.
    
    Returns:
    an EnvironmentData object that allows access to the environment data.
  - getThreadsData
```
ThreadsData getThreadsData()
```
    Gets the threads data that is associated with this Health Center connection.
    
    Returns:
    a ThreadsData object that allows access to the threads data.
  - getVMControl
```
VMControl getVMControl()
```
    Gets the VMControl object that is associated with this Health Center connection.
    
    Returns:
    a VMControl object, which you can use to trigger events that operate on the monitored application. NOTE: This method only has an effect when connected to a live application.
  - getProfilingData
```
ProfilingData getProfilingData()
```
    Gets the profiling data that is associated with this Health Center connection.
    
    Returns:
    a ProfilingData object that allows access to the profiling data.
  - getLockingData
```
LockingData getLockingData()
```
    Gets the locking data that is associated with this Health Center connection.
    
    Returns:
    a LockingData object that allows access to the locking data.
  - getPreferences
```
HealthCenterPreferences getPreferences()
```
    Gets a HealthCenterPreferences object, on which preferences can be set.
    
    Returns:
    the HealthCenterPreferences object for this Health Center connection.
  - saveData
```
void saveData(java.io.File name)
              throws java.io.IOException
```
    Saves the current Health Center data to disk. Filenames have the following format: healthcenter_yyyymmddhhmm_index.hcd.
    
    Parameters:
    name - A filename or directory to save the data to. If a directory is specified, the default value of healthcenter is used for the filename.
    
    Throws:
    
    java.io.IOException - if the directory does not exist
  - resetData
```
void resetData()
```
    Clears all current Health Center data.
  - getAmountOfDataReceived
```
long getAmountOfDataReceived()
```
    Gets the number of bytes read so far by the Health Center.
    
    Returns:
    the amount of data received, in bytes.
  - isConnectionAlive
```
boolean isConnectionAlive()
```
    Whether the connection is currently connected. For files, this value is slightly ambiguous but will be always true, unless the file is deleted halfway through reading.
    
    Returns:
    a boolean indicating whether the connection is alive.
  - getLastUpdated
```
java.util.Date getLastUpdated()
```
    Gets the time when data was last received (variable).
    
    Returns:
    the time that the last data was received.
  - getEarliestMonitoredDataTime
```
java.util.Date getEarliestMonitoredDataTime()
```
    Gets the time of the first piece of monitored data.
    
    Returns:
    the time of the first piece of monitored data.
  - getLatestMonitoredDataTime
```
java.util.Date getLatestMonitoredDataTime()
```
    Gets the time of the latest piece of monitored data.
    
    Returns:
    the time of the latest piece of monitored data.
  - endMonitoring
```
void endMonitoring()
```
    Ends the monitoring of the application, although the agent remains running to allow future connections.

Interface HealthCenter

Method Summary

Method Detail

setTimeThreshold

setTimeThresholds

setFineGrainTimeThresholds

clearTimeThresholds

getIOData

getClassesData

getCpuData

getGCData

getMethodTraceData

getNativeMemoryData

getEnvironmentData

getThreadsData

getVMControl

getProfilingData

getLockingData

getPreferences

saveData

resetData

getAmountOfDataReceived

isConnectionAlive

getLastUpdated

getEarliestMonitoredDataTime

getLatestMonitoredDataTime

endMonitoring