Add DB connection service This should improve usability of the Thermostat shell. In particular in a remote setup. The current situation is that if a shell is fired up it does not make a connection to storage. So if a user has storage set up to bind to a "public" IP, 192.1.1.129 say, then mongo requires username/password for connections. This results in bad usability of the shell: ./bin/thermostat shell Thermostat > ping Could not connect to db mongodb://192.168.1.14:27518 (creds are missing or incorrect host IP in user prefs) Thermostat > ping --username blah --password blah -d mongodb://example.org (works) Thermostat > list-vms --username blah --password blah -d ... (i.e. a user needs to pass credential info for every command on the shell). This patch introduces a "connect" and "disconnect" command which establishes a DB connection on demand and registers a DbService. The above shell session becomes: ./bin/thermostat shell Thermostat > ping Could not connect to db mongodb://192.168.1.14:27518 Thermostat > connect -d mongodb://192.168.1.14:27518 -u blah -p blah Thermostat > ping agent-id (works) Thermostat > list-vms (works) Thermostat > disconnect (disconnects from mongo storage at 192.168.1.14:27518) Thermostat > ping Could not connect to db mongodb://192.168.1.14:27518 Details of the patch: ----------------------------------------------------------------- 1. It removes AppContextSetup/AppContextSetupImpl 2. Modifies LauncherImpl in order to use the new DbService (i.e. other use cases remain the same) 3. OSGIUtils now returns the ServiceRegistration for registered services. 4. Added a method which allows services to be null to OSGIUtils. Existing getService() throws a NPE if the service reference is null (bundleContext.getServiceReference(clazz)). 5. Adds ConnectCommand ("connect" on shell) 6. Adds DisconnectCommand ("disconnect" on shell) 7. Tests Reviewed-by: omajid Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2012-September/003341.html PR1164

MISSING_INFO = Missing Information

VALUE_AND_UNIT = {0} {1}

COMMAND_LIST_VMS_DESCRIPTION = lists all currently monitored VMs

COMMAND_SHELL_DESCRIPTION = launches the Thermostat interactive shell

COMMAND_VM_INFO_DESCRIPTION = shows basic information about a VM

COMMAND_VM_STAT_DESCRIPTION = show various statistics about a VM
COMMAND_VM_STAT_ARGUMENT_CONTINUOUS_DESCRIPTION = print data continuously

COMMAND_CONNECT_DESCRIPTION = persistenly connect to a database
COMMAND_CONNECT_ALREADY_CONNECTED = Already connected to storage. Please use disconnect command to disconnect.
COMMAND_CONNECT_FAILED_TO_CONNECT = Could not connect to db {0}

COMMAND_DISCONNECT_DESCRIPTION = disconnect from the currently used database
COMMAND_DISCONNECT_NOT_CONNECTED = Not connected to storage. You may use the connect command for establishing connections.
COMMAND_DISCONNECT_ERROR = Failed to disconnect from database.

VM_INFO_PROCESS_ID = Process ID:
VM_INFO_START_TIME = Start time:
VM_INFO_STOP_TIME = Stop time:
VM_INFO_MAIN_CLASS = Main class:
VM_INFO_COMMAND_LINE = Command line:
VM_INFO_JAVA_VERSION = Java version:
VM_INFO_VIRTUAL_MACHINE = Virtual machine:
VM_INFO_VM_ARGUMENTS = VM arguments:

COLUMN_HEADER_HOST_ID = HOST_ID
COLUMN_HEADER_HOST = HOST
COLUMN_HEADER_VM_ID  = VM_ID
COLUMN_HEADER_VM_NAME = VM_NAME
COLUMN_HEADER_VM_STATUS = STATUS
COLUMN_HEADER_TIME = TIME
COLUMN_HEADER_CPU_PERCENT = %CPU
COLUMN_HEADER_MEMORY_PATTERN = MEM.{0}

VM_STOP_TIME_RUNNING = <Running>
VM_STATUS_ALIVE = RUNNING
VM_STATUS_DEAD = EXITED