Union FileSystem - A Building Blocks Of a ContainerKnoldus Inc.
?
The document discusses the building blocks of container technology, focusing on union file systems and copy-on-write (CoW) mechanisms. It addresses the issues associated with large containers, such as deployment delays and increased costs, while explaining the layered architecture of containers. Additionally, the document includes experiments to demonstrate the functionality of union file systems and CoW strategies.
Le document présente JavaServer Faces (JSF), un framework pour le développement d'applications web en Java, mettant en avant sa structure MVC, ses composants réutilisables et son approche orientée vers la séparation des couches. Il examine aussi les avantages de JSF par rapport à des technologies comme Struts, tout en abordant des défis liés à sa maturité et sa documentation. Enfin, le document détaille la configuration nécessaire à l'utilisation de JSF dans une application Java EE, ainsi que des ressources et tutoriels disponibles pour les développeurs.
Firebase is a real-time backend service that allows developers to build mobile and web applications without having to manage their own backend infrastructure. It provides features like analytics, notifications, crash reporting, authentication, and cloud storage out of the box. As a NoSQL database, it allows for fast response times compared to traditional web services. Firebase is useful for building real-time applications like chat apps or ones that require syncing data across multiple devices. It also offers benefits like free scalability, push notifications, and integration with other Google services and platforms.
This document provides an introduction to Firebase, a mobile and web application development platform. It discusses what Firebase is, its use cases, features like its realtime database and security rules. The document also covers Firebase's pricing, history, and alternatives. Firebase provides tools to create applications without server-side programming and allows for realtime syncing of data across clients. It advocates for structuring data in a flattened, scalable manner and provides security rules to control access.
This document provides an overview of using Firebase to develop a mobile application. It discusses that Firebase handles many backend tasks like authentication, databases, file storage, analytics and more. This allows developing mobile apps with a smaller team as backend engineers are not needed. The document also summarizes key Firebase features like real-time sync, offline support, security, and hosting. It provides code examples for authentication, databases and storage.
The document discusses the basic components of an Android app. It explains that an Android app consists of components like activities, services, broadcast receivers, and content providers. Activities provide the main user interface and common ones include launching the app and navigating within it. The app manifest file defines these components. The document also covers activities and intents, explaining how activities are launched via explicit and implicit intents and how data can be passed between activities.
Visual Studio Code is a lightweight but powerful source code editor that runs on Windows, macOS and Linux. It provides code completion, debugging, integrated terminal and support for many programming languages including JavaScript, TypeScript, C++, C#, Python and PHP. The document discusses the key features of VS Code like speed, cross-platform support, debugging and IntelliSense code completion. It also provides instructions for downloading and using VS Code on different platforms through the command line.
The document discusses location-based services on Android. It describes how to obtain a user's location on Android using the LocationManager and LocationListener classes from the Android location framework. It covers the permissions needed to access coarse or fine user location data and provides examples of getting user location updates. It also introduces commonly used location APIs from Google Places and Foursquare for conducting place searches and queries based on user location.
Le document présente un TP sur le développement Android portant sur les éléments graphiques avancés tels que les fragments et les menus. Il explique la création et l'utilisation de fragments, leur cycle de vie, ainsi que la gestion des menus via l'action bar et les menus contextuels. Des exercices pratiques sont inclus pour renforcer l'apprentissage des concepts abordés.
Firebase is a backend-as-a-service platform developed by Google that allows developers to build, improve, and grow applications efficiently. It offers features like authentication, cloud functions, databases, app quality monitoring, and tools for analytics, messaging, and A/B testing, making it a versatile solution for app development. Firebase provides a generous free tier and integrates with various services to streamline app development and monetization through ads.
The document discusses the challenges and techniques involved in mobile application testing, outlining issues like device fragmentation, varying network conditions, and the need for diverse input/output modalities. It emphasizes the importance of testing on real devices and provides guidance on gathering useful data, developing test cases, and using various testing tools for both web and on-device applications. Additionally, it mentions the significance of user feedback and external resources for enhancing testing processes.
Le document traite des design patterns en programmation orientée objet, en mettant en avant le pattern 'état' qui permet de modifier le comportement d'un objet en fonction de son état interne. Il présente également les patterns 'template method', 'command', et 'mediator', chacun ayant son propre objectif et applications spécifiques pour structurer et gérer le code de manière efficace. Des exemples de mise en ?uvre en Java illustrent le fonctionnement de chacun de ces patterns.
The document discusses Android location services and maps. It provides an overview of the Android location framework for determining a device's location and listening for location updates. It also discusses using the Google Maps external library for displaying and managing maps. It covers topics like requesting location updates, permissions, and displaying latitude and longitude on a map. It also discusses custom markers and overlays for displaying graphics on maps.
Infrastructure as Code with Terraform.pptxSamuel862293
?
Terraform is an infrastructure as code tool that allows infrastructure to be provisioned and managed declaratively through code. It aims to streamline operations by automating infrastructure provisioning and management, reducing manual efforts and errors. The document discusses how Terraform works, including defining infrastructure through configuration files, connecting to providers to provision resources, and best practices for using Terraform like version control and remote state management. A demo is also provided to illustrate provisioning an EC2 instance with Terraform.
Organizing backend data is difficult but Firebase provides tools to help build better apps, improve quality, and grow business. It offers integrated, cross-platform solutions for authentication, databases, storage, hosting, and more. Firebase's services like Cloud Firestore, Storage, Functions, and Authentication can be easily accessed through SDKs and handle tasks like data organization, file storage, backend code, and notifications.
Building infrastructure as code using Terraform - DevOps KrakowAnton Babenko
?
This document provides an overview of a DevOps meetup on building infrastructure as code using Terraform. The agenda includes Terraform basics, frequent questions, and problems. The presenter then discusses Terraform modules, tools, and solutions. He addresses common questions like secrets handling and integration with other tools. Finally, he solicits questions from the audience on Terraform use cases and challenges.
Docker storage drivers by Jér?me PetazzoniDocker, Inc.
?
The document provides an in-depth exploration of Docker storage drivers, including their history, functioning, and importance. Key topics include the operations of various drivers like aufs, btrfs, and device mapper, along with technical insights into copy-on-write mechanisms that enable efficient container management. It emphasizes that without copy-on-write technology, Docker's practicality and efficiency on Linux systems would be severely compromised.
Le document est un cours sur les vues à adaptateurs et les bo?tes de dialogue dans le développement d'applications mobiles, présenté par Dr. Chaouche à l'Université Constantine 2. Il explique comment créer et manipuler des vues à adaptateur, y compris la création de vues à adaptateur personnalisées. Le cours couvre également les interactions avec AdapterView à travers divers listeners et fournit des exemples pratiques de code pour illustrer les concepts.
Terraforming your Infrastructure on GCPSamuel Chow
?
The document discusses the evolution of software deployment, highlighting the transition from expensive mainframes to cloud-based solutions using tools like Terraform, Kubernetes, and Docker. It emphasizes the benefits of Infrastructure as Code (IaC), including automation, version control, and resource management, and provides a detailed overview of Terraform's functionality, commands, and project layout. Additionally, it covers how to connect to Google Cloud Platform (GCP) and deploy applications in a Kubernetes cluster.
This document discusses Terraform, an open-source tool that allows users to define and provision infrastructure resources in a declarative configuration file. It summarizes that Terraform allows users to build, change, and destroy infrastructure components like compute instances, storage buckets, and networking through declarative configuration files, enabling an infrastructure-as-code approach that is easy to version, track changes for, and integrate with continuous delivery practices.
This document discusses Android AsyncTask, which allows performing long/background operations without threads. It has four main methods: doInBackground runs the long operation, onPostExecute displays results after completion, onPreExecute runs before doInBackground, and onProgressUpdate reports progress. An example AsyncTask downloads files, tracking progress in onProgressUpdate and displaying results in onPostExecute after doInBackground finishes downloading. AsyncTask requires specifying types for parameters, progress, and results.
The document provides a detailed outline of the MediaPlayer subsystem in Android, including its components and playback flow involving both Stagefright and AwesomePlayer frameworks. It describes various libraries and functions used for media playback, focusing on setting data sources, player types, and callback mechanisms. Additionally, it includes code snippets for implementing simple playback operations and managing player state transitions.
Terraform is an infrastructure as code tool that enables users to define and manage cloud and on-prem resources using human-readable configuration files. It automates infrastructure provisioning and management through a workflow that includes writing configuration, planning changes, and applying those changes while tracking states through a state file. Terraform supports reusable modules and integrates with version control systems to enhance collaboration and standardize configurations.
The document outlines a comprehensive guide on setting up a React and Redux project, detailing the project structure and essential components. It covers key concepts such as state management, actions, reducers, and connecting React components to a Redux store, along with practical hands-on exercises. Additionally, it provides resources and examples for routing with React Router and further learning materials.
The document discusses the different building blocks of an Android application including activities, services, broadcast receivers, and content providers. It provides details on broadcast receivers, describing them as components that respond to system-wide broadcasts and application-initiated broadcasts. The document gives an example of using a broadcast receiver to capture the SMS receive event and launch an activity to display the SMS with an option to reply. It also discusses programmatically sending SMS from an application.
The document describes an implementation of the Observer design pattern to create a weather monitoring application. It begins with an introduction to design patterns and the observer pattern. It then outlines the requirements of a sample weather monitoring application and identifies issues with an initial implementation. The document explains how to address these issues by implementing the observer pattern with interfaces for Subject and Observer. It provides class diagrams and code examples to demonstrate how to build the weather monitoring application using the observer pattern to update multiple display elements when weather data changes. It also shows how new display elements can be added easily to the application.
Este documento proporciona una guía práctica sobre el uso de Vagrant y Docker. Explica qué son Vagrant, Docker y VirtualBox, e incluye instrucciones detalladas sobre cómo instalarlos y usar sus comandos y características básicas como levantar máquinas virtuales, compartir carpetas, publicar puertos y crear e implementar contenedores de Docker personalizados.
This document discusses various ways to access hardware on Android systems. It begins with an introduction to accessing hardware differently on Android compared to GNU/Linux systems. It then covers direct access from applications, using the Android Hardware Abstraction Layer (HAL), adding a custom system service, and building native applications that can directly access hardware. The document provides code examples for each method.
Le document présente un TP sur le développement Android portant sur les éléments graphiques avancés tels que les fragments et les menus. Il explique la création et l'utilisation de fragments, leur cycle de vie, ainsi que la gestion des menus via l'action bar et les menus contextuels. Des exercices pratiques sont inclus pour renforcer l'apprentissage des concepts abordés.
Firebase is a backend-as-a-service platform developed by Google that allows developers to build, improve, and grow applications efficiently. It offers features like authentication, cloud functions, databases, app quality monitoring, and tools for analytics, messaging, and A/B testing, making it a versatile solution for app development. Firebase provides a generous free tier and integrates with various services to streamline app development and monetization through ads.
The document discusses the challenges and techniques involved in mobile application testing, outlining issues like device fragmentation, varying network conditions, and the need for diverse input/output modalities. It emphasizes the importance of testing on real devices and provides guidance on gathering useful data, developing test cases, and using various testing tools for both web and on-device applications. Additionally, it mentions the significance of user feedback and external resources for enhancing testing processes.
Le document traite des design patterns en programmation orientée objet, en mettant en avant le pattern 'état' qui permet de modifier le comportement d'un objet en fonction de son état interne. Il présente également les patterns 'template method', 'command', et 'mediator', chacun ayant son propre objectif et applications spécifiques pour structurer et gérer le code de manière efficace. Des exemples de mise en ?uvre en Java illustrent le fonctionnement de chacun de ces patterns.
The document discusses Android location services and maps. It provides an overview of the Android location framework for determining a device's location and listening for location updates. It also discusses using the Google Maps external library for displaying and managing maps. It covers topics like requesting location updates, permissions, and displaying latitude and longitude on a map. It also discusses custom markers and overlays for displaying graphics on maps.
Infrastructure as Code with Terraform.pptxSamuel862293
?
Terraform is an infrastructure as code tool that allows infrastructure to be provisioned and managed declaratively through code. It aims to streamline operations by automating infrastructure provisioning and management, reducing manual efforts and errors. The document discusses how Terraform works, including defining infrastructure through configuration files, connecting to providers to provision resources, and best practices for using Terraform like version control and remote state management. A demo is also provided to illustrate provisioning an EC2 instance with Terraform.
Organizing backend data is difficult but Firebase provides tools to help build better apps, improve quality, and grow business. It offers integrated, cross-platform solutions for authentication, databases, storage, hosting, and more. Firebase's services like Cloud Firestore, Storage, Functions, and Authentication can be easily accessed through SDKs and handle tasks like data organization, file storage, backend code, and notifications.
Building infrastructure as code using Terraform - DevOps KrakowAnton Babenko
?
This document provides an overview of a DevOps meetup on building infrastructure as code using Terraform. The agenda includes Terraform basics, frequent questions, and problems. The presenter then discusses Terraform modules, tools, and solutions. He addresses common questions like secrets handling and integration with other tools. Finally, he solicits questions from the audience on Terraform use cases and challenges.
Docker storage drivers by Jér?me PetazzoniDocker, Inc.
?
The document provides an in-depth exploration of Docker storage drivers, including their history, functioning, and importance. Key topics include the operations of various drivers like aufs, btrfs, and device mapper, along with technical insights into copy-on-write mechanisms that enable efficient container management. It emphasizes that without copy-on-write technology, Docker's practicality and efficiency on Linux systems would be severely compromised.
Le document est un cours sur les vues à adaptateurs et les bo?tes de dialogue dans le développement d'applications mobiles, présenté par Dr. Chaouche à l'Université Constantine 2. Il explique comment créer et manipuler des vues à adaptateur, y compris la création de vues à adaptateur personnalisées. Le cours couvre également les interactions avec AdapterView à travers divers listeners et fournit des exemples pratiques de code pour illustrer les concepts.
Terraforming your Infrastructure on GCPSamuel Chow
?
The document discusses the evolution of software deployment, highlighting the transition from expensive mainframes to cloud-based solutions using tools like Terraform, Kubernetes, and Docker. It emphasizes the benefits of Infrastructure as Code (IaC), including automation, version control, and resource management, and provides a detailed overview of Terraform's functionality, commands, and project layout. Additionally, it covers how to connect to Google Cloud Platform (GCP) and deploy applications in a Kubernetes cluster.
This document discusses Terraform, an open-source tool that allows users to define and provision infrastructure resources in a declarative configuration file. It summarizes that Terraform allows users to build, change, and destroy infrastructure components like compute instances, storage buckets, and networking through declarative configuration files, enabling an infrastructure-as-code approach that is easy to version, track changes for, and integrate with continuous delivery practices.
This document discusses Android AsyncTask, which allows performing long/background operations without threads. It has four main methods: doInBackground runs the long operation, onPostExecute displays results after completion, onPreExecute runs before doInBackground, and onProgressUpdate reports progress. An example AsyncTask downloads files, tracking progress in onProgressUpdate and displaying results in onPostExecute after doInBackground finishes downloading. AsyncTask requires specifying types for parameters, progress, and results.
The document provides a detailed outline of the MediaPlayer subsystem in Android, including its components and playback flow involving both Stagefright and AwesomePlayer frameworks. It describes various libraries and functions used for media playback, focusing on setting data sources, player types, and callback mechanisms. Additionally, it includes code snippets for implementing simple playback operations and managing player state transitions.
Terraform is an infrastructure as code tool that enables users to define and manage cloud and on-prem resources using human-readable configuration files. It automates infrastructure provisioning and management through a workflow that includes writing configuration, planning changes, and applying those changes while tracking states through a state file. Terraform supports reusable modules and integrates with version control systems to enhance collaboration and standardize configurations.
The document outlines a comprehensive guide on setting up a React and Redux project, detailing the project structure and essential components. It covers key concepts such as state management, actions, reducers, and connecting React components to a Redux store, along with practical hands-on exercises. Additionally, it provides resources and examples for routing with React Router and further learning materials.
The document discusses the different building blocks of an Android application including activities, services, broadcast receivers, and content providers. It provides details on broadcast receivers, describing them as components that respond to system-wide broadcasts and application-initiated broadcasts. The document gives an example of using a broadcast receiver to capture the SMS receive event and launch an activity to display the SMS with an option to reply. It also discusses programmatically sending SMS from an application.
The document describes an implementation of the Observer design pattern to create a weather monitoring application. It begins with an introduction to design patterns and the observer pattern. It then outlines the requirements of a sample weather monitoring application and identifies issues with an initial implementation. The document explains how to address these issues by implementing the observer pattern with interfaces for Subject and Observer. It provides class diagrams and code examples to demonstrate how to build the weather monitoring application using the observer pattern to update multiple display elements when weather data changes. It also shows how new display elements can be added easily to the application.
Este documento proporciona una guía práctica sobre el uso de Vagrant y Docker. Explica qué son Vagrant, Docker y VirtualBox, e incluye instrucciones detalladas sobre cómo instalarlos y usar sus comandos y características básicas como levantar máquinas virtuales, compartir carpetas, publicar puertos y crear e implementar contenedores de Docker personalizados.
This document discusses various ways to access hardware on Android systems. It begins with an introduction to accessing hardware differently on Android compared to GNU/Linux systems. It then covers direct access from applications, using the Android Hardware Abstraction Layer (HAL), adding a custom system service, and building native applications that can directly access hardware. The document provides code examples for each method.
本书《wxPython in Action》由Harri Pasanen和Robin Dunn撰写,介绍了wxPython的基础知识和高级应用,包括创建最小应用、事件驱动编程、使用对话框和菜单等内容。文档详尽地涵盖了从基本控件到复杂界面的构建和管理技巧,是学习wxPython开发的重要资源。读者将学会如何使用wxPython构建功能丰富的GUI程序。
AhnLab TrusGuard SCM 1100 is a network security device designed to protect against threats from worms and malicious programs. The document serves as an installation and user guide, detailing setup procedures, configuration options, and system access methods for the device. Users can manage network security settings via a web interface after initial configuration through a console connection.
The document discusses using a micro:bit for light sensing applications. It explains how the micro:bit can sense light levels using its LEDs as photodiodes. When an LED pin is set as an analog input, the voltage measured corresponds to the ambient light level. Two example projects are described - an automatic night light that adjusts its brightness based on light levels, and a magic face panel display that changes expressions when the LED is covered and uncovered.
The document provides instructions and examples for using switches, capacitive touch, and game controls on the micro:bit. It includes tutorials for building guessing games where the micro:bit guesses a number by narrowing the range, adjusting LED brightness with touch pins, and creating a dodgeball game where the player character avoids falling balls. Code snippets and step-by-step explanations are given for each example project.
This document discusses LED display control on the micro:bit board. It covers LED principles and applications, the micro:bit LED matrix, LED display control commands including displaying numbers, text, images and arrows. It provides examples of breathing lights, fireworks, and a dynamic screen using variables, conditional and counting loops.
The document describes how to create a 2D platformer game in Unity, including:
1) Adding background animations and music
2) Creating and controlling the player character
3) Spawning random enemies
4) Implementing a health bar UI to display the player's health
25. using UnityEngine;
using Vuforia;
public class DefaultTrackableEventHandler:MonoBehaviour, ITrackableEventHandler
{
#region PROTECTED_MEMBER_VARIABLES protected TrackableBehaviour mTrackableBehaviour;
protected TrackableBehaviour.Status m_PreviousStatus;
protected TrackableBehaviour.Status m_NewStatus;
#endregion // PROTECTED_MEMBER_VARIABLES
#region UNITY_MONOBEHAVIOUR_METHODS
protected virtual void Start() {
mTrackableBehaviour = GetComponent<TrackableBehaviour>();
if (mTrackableBehaviour)
mTrackableBehaviour.RegisterTrackableEventHandler(this);
}
protected virtual void OnDestroy() {
if (mTrackableBehaviour)
mTrackableBehaviour.UnregisterTrackableEventHandler(this);
}
#endregion // UNITY_MONOBEHAVIOUR_METHODS
解析DefaultTrackableEventHandler 2/7
25
實作ITrackableEventHandle介面
26. #region PUBLIC_METHODS
/*Implementation of the ITrackableEventHandler function called when the
tracking state changes. */
public void OnTrackableStateChanged(
TrackableBehaviour.Status previousStatus,
TrackableBehaviour.Status newStatus) {
m_PreviousStatus = previousStatus;
m_NewStatus = newStatus;
Debug.Log("Trackable " + mTrackableBehaviour.TrackableName +
" " + mTrackableBehaviour.CurrentStatus +
" -- " + mTrackableBehaviour.CurrentStatusInfo);
if (newStatus == TrackableBehaviour.Status.DETECTED ||
newStatus == TrackableBehaviour.Status.TRACKED ||
newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED) {
OnTrackingFound();
}
else if (previousStatus == TrackableBehaviour.Status.TRACKED &&
newStatus == TrackableBehaviour.Status.NO_POSE) {
OnTrackingLost();
}
解析DefaultTrackableEventHandler 3/7
26
27. else {
// For combo of previousStatus=UNKNOWN + newStatus=UNKNOWN|NOT_FOUND
// Vuforia is starting, but tracking has not been lost or found yet
// Call OnTrackingLost() to hide the augmentations
OnTrackingLost();
}
}
#endregion // PUBLIC_METHODS
解析DefaultTrackableEventHandler 4/7
27
28. #region PROTECTED_METHODS
protected virtual void OnTrackingFound() {
Debug.Log("OnTrackingFound");
if (mTrackableBehaviour) {
var rendererComponents =
mTrackableBehaviour.GetComponentsInChildren<Renderer>(true);
var colliderComponents =
mTrackableBehaviour.GetComponentsInChildren<Collider>(true);
var canvasComponents =
mTrackableBehaviour.GetComponentsInChildren<Canvas>(true);
foreach (var component in rendererComponents) // Enable rendering:
component.enabled = true;
foreach (var component in colliderComponents) // Enable colliders:
component.enabled = true;
foreach (var component in canvasComponents) // Enable canvas':
component.enabled = true;
}
}
解析DefaultTrackableEventHandler 5/7
28
29. protected virtual void OnTrackingLost() {
Debug.Log(" OnTrackingLost ");
if (mTrackableBehaviour) {
var rendererComponents =
mTrackableBehaviour.GetComponentsInChildren<Renderer>(true);
var colliderComponents =
mTrackableBehaviour.GetComponentsInChildren<Collider>(true);
var canvasComponents =
mTrackableBehaviour.GetComponentsInChildren<Canvas>(true);
foreach (var component in rendererComponents) // Disable rendering:
component.enabled = false;
foreach (var component in colliderComponents) // Disable colliders:
component.enabled = false;
foreach (var component in canvasComponents) // Disable canvas':
component.enabled = false;
}
}
#endregion // PROTECTED_METHODS
}
解析DefaultTrackableEventHandler 6/7
29