[IGNITE-2304] Improve exceptions handling for ignite-web-agent

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.6
• Component/s: wizards
• Assignee: Unassigned
• Reporter: Pavel Konstantinov
• Created: 28/Dec/15 08:55
• Updated: 29/Dec/15 07:31
• Resolved: 28/Dec/15 10:27

Description

Currently if I start ignite-web-agent with incorrect options it crashes with exception:

./ignite-web-agent.sh dfsd
[15:48:36,554][INFO ][main][AgentLauncher] Starting Apache Ignite Web Console Agent...
Exception in thread "main" com.beust.jcommander.ParameterException: Was passed main parameter 'dfsd' but no main parameter was defined
	at com.beust.jcommander.JCommander.getMainParameter(JCommander.java:914)
	at com.beust.jcommander.JCommander.parseValues(JCommander.java:759)
	at com.beust.jcommander.JCommander.parse(JCommander.java:282)
	at com.beust.jcommander.JCommander.parse(JCommander.java:265)
	at com.beust.jcommander.JCommander.<init>(JCommander.java:210)
	at org.apache.ignite.agent.AgentLauncher.main(AgentLauncher.java:53)

Will be much better if we will be handle such case and show some user-friendly info, for example the same as with --help option.