Tutorial by Examples: p

Checkpointing configuration is done in two steps. First, you need to choose a backend. Then, you can specify the interval and mode of the checkpoints in a per-application basis. Backends Available backends Where the checkpoints are stored depends on the configured backend: MemoryStateBackend...

The code Here is a simple flink application using a stateful mapper with an Integer managed state. You can play with the checkpointEnable, checkpointInterval and checkpointMode variables to see their effect: public class CheckpointExample { private static Logger LOG = LoggerFactory.getLogge...

A savepoint stores two things: (a) the positions of all datasources, (b) the states of operators. Savepoints are useful in many circonstances: slight application code updates Flink update changes in parallelism ... As of version 1.3 (also valid for earlier version): checkpoint must be ...

Configuration The configuration is in the file flink/conf/flink-conf.yaml (under Mac OSX via homebrew, it is /usr/local/Cellar/apache-flink/1.1.3/libexec/conf/flink-conf.yaml). Flink < 1.2: The configuration is very similar to the checkpoints configuration (topic available). The only differenc...

Before 1.2, the only way to persist state/retain a checkpoint after a job termination/cancellation/persistant failure was through a savepoint, which is triggered manually. Version 1.2 introduced persistent checkpoints. Persistent checkpoints behave very much like regular periodic checkpoints except...

import Foundation class DoggyPresenter { // MARK: - Private fileprivate let dogService: DoggyService weak fileprivate var dogView: DoggyView? init(dogService: DoggyService){ self.dogService = dogService } func attachView(_ attach: Bool, view: DoggyView...

This is a tutorial to create a hello world example: Used for this example: Android Studio 2.3; To Start use Android Studio to create a new Project with an empty activity. Then we add some simple functionality to the App that we can test: We add a button which when clicks displays "Hello World...

Getting set up to use webdev takes some time, if you're doing anything more than tweaking a bit of text. Here are the initial setup steps: $ mkdir site $ cd site $ git clone [email protected]:dart-lang/site-webdev.git $ source ./scripts/env-set.sh $ ./scripts/install-dart-sdk.sh $ ./s...

Detailed instructions on getting qt5 set up or installed.

This code will prompt you to create the directory with :w, or just do it with :w!: augroup vimrc-auto-mkdir autocmd! autocmd BufWritePre * call s:auto_mkdir(expand('<afile>:p:h'), v:cmdbang) function! s:auto_mkdir(dir, force) if !isdirectory(a:dir) \ && (a:f...

It is very common for C functions to accept pointers to other functions as arguments. Most popular example is setting an action to be executed when a button is clicked in some GUI toolkit library. It is possible to pass Haskell functions as C callbacks. To call this C function: void event_callback...

In this example, we will try to find JavaScript data which containing backgroundColor:'#FFF'. Then, we will change value of backgroundColor '#FFF' ⇨ '#ddd'. This code uses getWholeData() and setWholeData() methods to manipulate JavaScript data. Alternatively, html() method can be used to get data of...

Run-time memory management with Rc can be very useful, but it can also be difficult to wrap one's head around, especially if your code is very complex and a single instance is referenced by tens or even hundreds of other types in many scopes. Writing a Drop trait that includes println!("Droppi...

A SIMPLE TEMPLATE Let’s start with a very simple template that shows our name and our favorite thing: <div> Hello my name is {{name}} and I like {{thing}} quite a lot. </div> {}: RENDERING To render a value, we can use the standard double-curly syntax: My name is {{name}} P...

Background To get the product of a register and a constant and store it in another register, the naïve way is to do this: imul ecx, 3 ; Set ecx to 5 times its previous value imul edx, eax, 5 ; Store 5 times the contend of eax in edx Use lea Multiplications are expensive operation...

Detailed instructions on getting cocoa-touch set up or installed.

Android extensions also work with multiple Android Product Flavors. For example if we have flavors in build.gradle like so: android { productFlavors { paid { ... } free { ... } } } And for example, only the free flavor has ...

UINavigationController is used to form a tree-like hierarchy of view controllers, which is known as a navigation stack. From developers perspective: You can connect independently made controller and get all the benefits of a free hierarchy manager and common UI presenter gratis. UINavigationContro...

The C standard (C11, and C99 too) defines the following flags for printf(): FlagConversionsMeaning-allThe result of the conversion shall be left-justified within the field. The conversion is right-justified if this flag is not specified.+signed numericThe result of a signed conversion shall always ...

Below is an Employer entity class which is mapped to the table employer. As you can see I used fetch = FetchType.LAZY instead of fetch = FetchType.EAGER. The reason I am using LAZY is because Employer may have a lot of properties later on and every time I may not need to know all the fields of an Em...