![]() Since I had already read up sufficiently on POE (and the examples in the cookbook) and knew in general how I wanted my daemon to work, selecting the relevant recipes and reworking them was a pretty straightforward process. Rather, it boiled down to just one factor: almost all of the POE code I have here was based, in one way or another, on example code hosted on the POE Cookbook site. Despite this being my first time writing any program using POE, the speed of development was not down to amazing programming skill on my part. The reason for both the small size and quick development time can be attributed to the combination of Perl and POE. In all, it took about an evening's work to code and eliminate most of the major bugs. Using POE to develop a non-trivial program with a focus on asynchronous, event-based operationĪs I write this, the size of the program is significantly less than 1,000 lines (not including this documentation), while still managing to implement a reasonably complex network daemon. Daemons and method of communicating with them 3. Multicast (and peer-to-peer) networking 2. The reason for writing this program was to explore three key areas: 1. More commands could be added quite easily. Currently the only useful command that is implemented is 'list', which prints a list of all the disks that the daemon knows about. The client conencts via a local unix domain socket and, providing the connection succeeds, it will then be able to pass commands to the daemon. The diskd program can also be run in client mode on any machine that has a running diskd daemon. Thus the primary function of the program is to be able to locate disks, no matter which machine they are currently attached to. As a result of this, each daemon will be able to build up a full list of which disks are available in the peer network and to which machine they are attached. It also listens to the channel for incoming multicast messages from another peer and uses them to update its list of which disks are attached to that peer. It also sets up a periodic event that will send the details of the disks attached to the machine to other peers that have joined the multicast channel. The daemon then collects the list of disks attached to the system and schedules the collection to trigger again periodically. The first thing that it does is join a pre-defined multicast channel. It reports on all disks attached, regardless of whether the disk (or partition) is currently mounted or not.Ī copy of diskd should be run on each of the peer machines. ![]() The "blkid" program is used to gather this information. The information shared between peers in this example is the list of disks that are currently attached to each system. encapsulating a data structure that can be accessed and updated by the above using POE to periodically run an external program without blocking 5. using POE to achieve both of the above 4. communicating with local clients via a Unix domain socket 3. ![]() using multicast to send and receive data among several peers 2. This program is intended as an example of: 1. => list # show information about known disks UnixSocketServer and UnixSocketServer::Session classesĭiskd - An example POE-based, peer-to-peer disk finder/announcer SYNOPSIS $. ![]() Although you should still be able to complete the quests. If you reach around L 53 before starting Icespire Peak, you whont be able to finish this and need to do it on a new character.Ĭant even use share quest to start the quest line." (Suggested by Tabbe)ĮDIT 2: (Suggested by doowylloH) When you reach a high enough level (~53) there wont be any exclamation- or question marks above the heads of the "quest-givers". Kill the boss here and then enter the last room and deal with the two remaining wolves.ĮDIT: "You can miss this and most of the story quests. If you have low DPS, don't use a defender as companion as he will die pretty fast. This way you can be alone with the boss, just dodge his attacks and you should be fine. An easy way to kill him is lure him back in the tunnel you came from, the ads wont follow. However, lots of people have trouble with the boss. ![]()
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