Class: ManqodServer

Inherits:
Object
  • Object
show all
Includes:
DBSetup, DRb, DRbUndumped, Eprint, HeartBeat
Defined in:
lib/ManqodServer.rb

Overview

this file is part of manqod manqod is distributed under the CDDL licence the author of manqod is Dobai-Pataky Balint([email protected])

Constant Summary

Constants included from Eprint

Eprint::TERM_COLOUR

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from DBSetup

#check_sql_db, #create_conn, #create_sql_db_and_perms, #load_conns, #populate_manqod_db, #remove_conn, #save_conns, #set_conn_variables

Methods included from HeartBeat

#init_HeartBeat, #stop_HeartBeat

Methods included from Eprint

#ecode, #edebug, #eerror, #eeval, #eexception, #efatal, #einfo, #eprint, #ewarn, #getBinding, #report_mail

Constructor Details

#initialize(opts) ⇒ ManqodServer

Returns a new instance of ManqodServer.



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# File 'lib/ManqodServer.rb', line 11

def initialize(opts)
	@starting_up=true
	@uri=opts[:bind]
	@logdev=opts[:log]
	@log_level=opts[:debug]
	@report_address=opts[:report]
	@path=opts[:path]
	@connections_conf=opts[:connections_conf]
	@conns=Hash.new
	@dbs=Hash.new
	@connected_clients=Hash.new
end

Instance Attribute Details

#connected_clients ⇒ Object (readonly)

Returns the value of attribute connected_clients.



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# File 'lib/ManqodServer.rb', line 23

def connected_clients
  @connected_clients
end

#dbs ⇒ Object (readonly)

Returns the value of attribute dbs.



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# File 'lib/ManqodServer.rb', line 23

def dbs
  @dbs
end

#starting_up ⇒ Object (readonly)

Returns the value of attribute starting_up.



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# File 'lib/ManqodServer.rb', line 24

def starting_up
  @starting_up
end

#uri ⇒ Object (readonly)

Returns the value of attribute uri.



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# File 'lib/ManqodServer.rb', line 23

def uri
  @uri
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ManqodServer.rb', line 155

def alive?
	true
end

#conn(conn_name) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 66

def conn(conn_name)
	@conns[conn_name]
end

#conn_list ⇒ Object 



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# File 'lib/ManqodServer.rb', line 70

def conn_list
	@conns.each_pair{|conn_name,conn|
		yield conn_name,conn
	}
end

#default_connection ⇒ Object 



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# File 'lib/ManqodServer.rb', line 76

def default_connection
	dc=nil
	@conns.each_pair{|cn,c| dc=c if c.has_key?("client_default") && c["client_default"]}
	dc
end

#free_conn(conn_name) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 125

def free_conn(conn_name)
	if @dbs.has_key?(conn_name)
		@dbs[conn_name].exit
		@dbs.delete(conn_name)
		einfo("#{conn_name} freed.")
	end
end

#init ⇒ Object 



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# File 'lib/ManqodServer.rb', line 26

def init
	ManqodLogger.instance.set_log(@logdev) if @logdev
	einfo("setting log level to #{@log_level}")
	ManqodLogger.instance.set_level(@log_level) if @log_level
	ManqodLogger.instance.set_report_address(@report_address) if @report_address
	load_conns
	begin
		DRb.start_service(@uri,self)
	rescue =>err
		eerror("starting main server failed: #{err}")
		return false
	end
	@conns.sort{|a,b| a[1]["auto_load_order"] <=> b[1]["auto_load_order"]}.each{|conn| 
		load_conn(conn[0]) if conn[1]["auto_load"]
	}
	setup_clients
	init_HeartBeat
	@starting_up=false
	eprint("serving")
	DRb.thread.join
	einfo("graceful shutdown")
end

#load_conn(conn_name) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 90

def load_conn(conn_name)
	if @conns.has_key?(conn_name)
		begin
			@conns[conn_name]["key_name"]=conn_name
			@conns[conn_name]['pid']=fork{
				th=DrbDb.new(@conns[conn_name],@uri)
				th.init
			}
			Process.detach(@conns[conn_name]['pid'])
			edebug("forked \"#{conn_name}\" [#{@conns[conn_name]['uri']}](#{@conns[conn_name]['pid']})")
			
			begin
				sleep 1
				@dbs[conn_name]=DRb::DRbObject.new_with_uri(@conns[conn_name]['uri'])
#					@dbs[conn_name].alive?
				@dbs[conn_name].state
				@dbs[conn_name].setup_client
				rescue => err
				#check if pid is alive
				begin
					Process::kill(0,@conns[conn_name]['pid'])
				rescue Errno::ESRCH
					raise("Process with pid #{@conns[conn_name]['pid']} is dead")
				end
				ewarn("waiting for startup of #{conn_name} (#{err})")
				retry
			end while @dbs[conn_name].state != DrbDb::SERVING
		rescue =>err
			eerror("error starting connection:#{conn_name} #{err}, retrying")
			sleep 1
			retry
		end
	end
end

#register_client(client_id, client_object, client_db) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 146

def register_client(client_id,client_object,client_db)
	@connected_clients[client_id.clone]={:object => client_object, :db => client_db} unless @connected_clients.has_key?(client_id)
	einfo("#{client_id} registered to [#{client_db}]")
end

#reload_conn(conn_name) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 82

def reload_conn(conn_name)
	if @conns.has_key?(conn_name)
		free_conn(conn_name) if @dbs.has_key?(conn_name)
		load_conn(conn_name)
		setup_clients
	end
end

#setup_clients ⇒ Object 



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# File 'lib/ManqodServer.rb', line 49

def setup_clients
	#wait for all clients to start up
	begin
		begin
			found=false
			@dbs.each_value{|drbdb|
				unless drbdb.serving?
					found = true 
					sleep 1
				end
			}
		end while found
		@dbs.each_pair{|conn_name,drbdb| drbdb.setup_client unless drbdb.client and drbdb.client.alive?}
	rescue
	end
end

#stop ⇒ Object 



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# File 'lib/ManqodServer.rb', line 133

def stop
	@dbs.each_key{|dbn| 
		begin
			free_conn(dbn)
		rescue =>err
			eerror("cannot stop #{dbn}:#{err}")
		end
	}
	current_server.stop_service
	einfo("server halted")
	exit
end

#to_s ⇒ Object 



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# File 'lib/ManqodServer.rb', line 159

def to_s
	"ManqodServer"
end

#unregister_client(client_id) ⇒ Object 



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# File 'lib/ManqodServer.rb', line 150

def unregister_client(client_id)
	@connected_clients.delete(client_id)
	einfo("#{client_id} unregistered")
end