Results for http-shutdown

Minimal HTTP server with graceful shutdown & value passing

A gem packaging of the {HttpComponents}[http://hc.apache.org/] (formerly Jakarta Commons) HTTP Client for JRuby. * Provides commons-httpclient and commons-codec jars. * Provides a HC::HTTPClient::ManagerFacade for client and connection manager setup, start, shutdown.

DEPRECATED: Google has announced the Custom Search JSON API will be shut down on January 1, 2027. This gem will raise a DeprecatedError on instantiation. Please migrate to one of these alternatives before the shutdown date: - Algolia (https://www.algolia.com/) — hosted search with a generous free tier - Meilisearch (https://www.meilisearch.com/) — fast, open-source, self-hostable - Typesense (https://typesense.org/) — open-source, typo-tolerant search Original purpose: Ruby interface for the Google Custom Search JSON API, allowing Rails applications to add Google-powered site search using a Custom Search Engine ID.

Stīpa is a lightweight, zero-dependency HTTP/1.1 framework built entirely on Ruby stdlib. Features: - Pure stdlib (socket, thread, erb, json, securerandom) - HTTP/1.1 with keep-alive, SO_REUSEPORT, and TCP_NODELAY - Thread pool with bounded queue and graceful shutdown - Pre-compiled middleware stack with zero per-request overhead - ERB templates with layouts, partials, and Vue 3 island helpers - CLI generator for MVC and API-only applications - Structured logging in logfmt format - Named route parameters via regex captures

This is an experimental branch that implements a connection pool of Net::HTTP objects instead of a connection/thread. C/T is fine if you're only using your http threads to make connections but if you use them in child threads then I suspect you will have a thread memory leak. Also, I want to see if I get less connection resets if the most recently used connection is always returned. Also added a :force_retry option that if set to true will retry POST requests as well as idempotent requests. This branch is currently incompatible with the master branch in the following ways: * It doesn't allow you to recreate the Net::HTTP::Persistent object on the fly. This is possible in the master version since all the data is kept in thread local storage. For this version, you should probably create a class instance of the object and use that in your instance methods. * It uses a hash in the initialize method. This was easier for me as I use a HashWithIndifferentAccess created from a YAML file to define my options. This should probably be modified to check the arguments to achieve backwards compatibility. * The method shutdown is unimplemented as I wasn't sure how I should implement it and I don't need it as I do a graceful shutdown from nginx to finish up my connections. For connection issues, I completely recreate a new Net::HTTP instance. I was running into an issue which I suspect is a JRuby bug where an SSL connection that times out would leave the ssl context in a frozen state which would then make that connection unusable so each time that thread handled a connection a 500 error with the exception "TypeError: can't modify frozen". I think Joseph West's fork resolves this issue but I'm paranoid so I recreate the object. Compatibility with the master version could probably be achieved by creating a Strategy wrapper class for GenePool and a separate strategy class with the connection/thread implementation.

A patched version of Resque that interprets Heroku's TERM as a graceful shutdown. Visit http://quickleft.com/blog/heroku-s-cedar-stack-will-kill-your-resque-workers for more information. Resque is a Redis-backed Ruby library for creating background jobs, placing those jobs on multiple queues, and processing them later. Background jobs can be any Ruby class or module that responds to perform. Your existing classes can easily be converted to background jobs or you can create new classes specifically to do work. Or, you can do both. Resque is heavily inspired by DelayedJob (which rocks) and is comprised of three parts: * A Ruby library for creating, querying, and processing jobs * A Rake task for starting a worker which processes jobs * A Sinatra app for monitoring queues, jobs, and workers.

# COM # COM is an object-oriented wrapper around WIN32OLE. COM makes it easy to add behavior to WIN32OLE objects, making them easier to work with from Ruby. ## Usage ## Using COM is rather straightforward. There’s basically four concepts to keep track of: 1. COM objects 2. Instantiable COM objects 3. COM events 4. COM errors Let’s look at each concept separately, using the following example as a base. module Word end class Word::Application < COM::Instantiable def without_interaction with_properties('displayalerts' => Word::WdAlertsNone){ yield } end def documents Word::Documents.new(com.documents) end def quit(saving = Word::WdDoNotSaveChanges, *args) com.quit saving, *args end end ### COM Objects ### A COM::Object is a wrapper around a COM object. It provides error specialization, which is discussed later and a few utility methods. You typically use it to wrap COM objects that are returned by COM methods. If we take the example given in the introduction, Word::Documents is a good candidate: class Word::Documents < COM::Object DefaultOpenOptions = { 'confirmconversions' => false, 'readonly' => true, 'addtorecentfiles' => false, 'visible' => false }.freeze def open(path, options = {}) options = DefaultOpenOptions.merge(options) options['filename'] = Pathname(path).to_com Word::Document.new(com.open(options)) end end Here we override the #open method to be a bit easier to use, providing sane defaults for COM interaction. Worth noting is the use of the #com method to access the actual COM object to invoke the #open method on it. Also note that Word::Document is also a COM::Object. COM::Object provides a convenience method called #with_properties, which is used in the #without_interaction method above. It lets you set properties on the COM::Object during the duration of a block, restoring them after it exits (successfully or with an error). ### Instantiable COM Objects ### Instantiable COM objects are COM objects that we can connect to and that can be created. The Word::Application object can, for example, be created. Instantiable COM objects should inherit from COM::Instantiable. Instantiable COM objects can be told what program ID to use, whether or not to allow connecting to an already running object, and to load its associated constants upon creation. The program ID is used to determine what instantiable COM object to connect to. By default the name of the COM::Instantiable class’ name is used, taking the last two double-colon-separated components and joining them with a dot. For Word::Application, the program ID is “Word.Application”. The program ID can be set by using the .program_id method: class IDontCare::ForConventions < COM::Instantiable program_id 'Word.Application' end The program ID can be accessed with the same method: Word::Application.program_id # ⇒ 'Word.Application' Connecting to an already running COM object is not done by default, but is sometimes desirable: the COM object might take a long time to create, or some common state needs to be accessed. If the default for a certain instantiable COM object should be to connect, this can be done using the .connect method: class Word::Application < COM::Instantiable connect end If no running COM object is available, then a new COM object will be created in its stead. Whether or not a class uses the connection method can be queried with the .connect? method: Word::Application.connect? # ⇒ true Whether or not to load constants associated with an instantiable COM object is set with the .constants method: class Word::Application < COM::Instantiable constants true end and can similarly be checked: Word::Application.constants? # ⇒ true Constants are loaded by default. When an instance of the instantiable COM object is created, a check is run to see if constants should be loaded and whether or not they already have been loaded. If they should be loaded and they haven’t already been loaded, they’re, you guessed it, loaded. The constants are added to the module containing the COM::Instantiable. Thus, for Word::Application, the Word module will contain all the constants. Whether or not the constants have already been loaded can be checked with .constants_loaded?: Word::Application.constants_loaded # ⇒ false That concludes the class-level methods. Let’s begin with the #connected? method among the instance-level methods. This method queries whether or not this instance connected to an already running COM object: Word::Application.new.connected? # ⇒ false This can be very important in determining how shutdown of a COM object should be done. If you connected to an already COM object it might be foolish to shut it down if someone else is using it. The #initialize method takes a couple of options: * connect: whether or not to connect to a running instance * constants: whether or not to load constants These options will, when given, override the class-level defaults. ### Events ### COM events are easily dealt with: class Word::Application < COM::Instantiable def initialize(options = {}) super @events = COM::Events.new(com, 'ApplicationEvents', 'OnQuit') end def quit(saving = Word::WdDoNotSaveChanges, *args) @events.observe('OnQuit', proc{ com.quit saving, *args }) do yield if block_given? end end end To tell you the truth this API sucks and will most likely be rewritten. The reason that it is the way it is is that WIN32OLE, which COM wraps, sucks. It’s event API is horrid and the implementation is buggy. It will keep every registered event block in memory for ever, freeing neither the blocks nor the COM objects that yield the events. ### Errors ### All errors generated by COM methods descend from COM::Error, except for those cases where a Ruby error already exists. The following HRESULT error codes are turned into Ruby errors: HRESULT Error Code | Error Class -------------------|------------ 0x80004001 | NotImplementedError 0x80020005 | TypeError 0x80020006 | NoMethodError 0x8002000e | ArgumentError 0x800401e4 | ArgumentError There are also a couple of other HRESULT error codes that are turned into more specific errors than COM::Error: HRESULT Error Code | Error Class -------------------|------------ 0x80020003 | MemberNotFoundError 0x800401e3 | OperationUnavailableError Finally, when a method results in any other error, a COM::MethodInvocationError will be raised, which can be queried for the specifics, specifically #message, #method, #server, #code, #hresult_code, and #hresult_message. ### Pathname ### The Pathname object receives an additional method, #to_com. This method is useful for when you want to pass a Pathname object to a COM method. Simply call #to_com to turn it into a String of the right encoding for COM: Word::Application.new.documents.open(Pathname('a.docx').to_com) # ⇒ Word::Document ## Installation ## Install COM with % gem install com ## License ## You may use, copy and redistribute this library under the same [terms][1] as Ruby itself. [1]: http://www.ruby-lang.org/en/LICENSE.txt ## Contributors ## * Nikolai Weibull

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