Metacat

Add method to get identifier set.

Set up a Timer to run the regenerating solr index task periodically.

Add code to handle delete data package information when delete a pid in the solr index.

Add two static methods to get the SystemMetadata and data object InputStream for the specified id.

Change the code since the ApplicationController's constructor was changed.

Add code to check if the metacat.properties is available.

If solr is not enabled, it would not be running.

Use another thread in the Servlet init method to wait hazelcast.

Put the waiting mechanism for the hazelcast at the first place.

Temporarily remove the code to disable solr engine if it isn't listed in the property file.