Contents
- 1 When to use a centrally stored configuration pattern?
- 2 What’s the best way to deal with optional dependencies?
- 3 When to use optional parameters in a method?
- 4 Which is an example of a builder pattern?
- 5 How are configuration settings shared between multiple applications?
- 6 How to create an external configuration store interface?
- 7 How is the Blob used in the configuration store?
When to use a centrally stored configuration pattern?
Centrally stored configurations, which change application behavior during runtime, are critically important and should be deployed, updated, and managed using the same mechanisms as deploying application code.
What’s the best way to deal with optional dependencies?
As usual in programming, there’s no one best way to tackle the problem. Another possible solution for optional dependencies is the Null Object pattern, which in some cases may be preferable. Not a silver bullet
When to use optional parameters in a method?
When a method can accept optional parameters, it’s preferable to adopt the well-proven approach and design such case using method overloading. In the example of the SystemMessageclass, declaring two separate constructors are superior to using Optional.
How many design patterns are there in Java?
Design patterns are quite often created for and used by OOP Languages, like Java, in which most of the examples from here on will be written. There are about 26 Patterns currently discovered (I hardly think I will do them all…). These 26 can be classified into 3 types:
What are the different types of Design Patterns?
Behavioral: These patterns are designed depending on how one class communicates with others. In this post, we will go through one basic design pattern for each classified type. The Singleton Design Pattern is a Creational pattern, whose objective is to create only one instance of a class and to provide only one global access point to that object.
Which is an example of a builder pattern?
Unlike other creational patterns, Builder doesn’t require products to have a common interface. That makes it possible to produce different products using the same construction process. Usage examples: The Builder pattern is a well-known pattern in C++ world.
Configuration settings that are shared between multiple applications and application instances, or where a standard configuration must be enforced across multiple applications and application instances. A standard configuration system that doesn’t support all of the required configuration settings, such as storing images or complex data types.
How to create an external configuration store interface?
Ensure that the configuration interface can expose the configuration data in the required formats such as typed values, collections, key/value pairs, or property bags. Consider how the configuration store interface will behave when settings contain errors, or don’t exist in the backing store.
Where are configuration files stored in an application?
The majority of application runtime environments include configuration information that’s held in files deployed with the application. In some cases, it’s possible to edit these files to change the application behavior after it’s been deployed.
How is a configuration store implemented in azure?
Azure Blob storage provides a hierarchical, container-based store that can hold any type of data in individually named blobs. The following example shows how a configuration store can be implemented over Blob storage to store and expose configuration information.
How is the Blob used in the configuration store?
This interface defines methods for retrieving and updating configuration settings held in the configuration store, and includes a version number that can be used to detect whether any configuration settings have been modified recently. The BlobSettingsStore class uses the ETag property of the blob to implement versioning.