I'm starting to learn BW6 and have a project where I need to populate a data cache. For this cache I want to use Redis.
Unfortunately there doesn't seem to be an adapter I can use to do this. There are several java clients I could use but since it's all new to me I wanted to avoid doing custom Java right away. Is there another way to read and write from Redis without custom Java in BW6?
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In My Application, Using the below technologies
Spring boot 2.7.x
Cassandra
spring batch 5. x
java 11
As part of this, I need to extract data from the Cassandra database and need to write out the file
so here I need to use queries to fetch data so
just want to know what is the best way to maintain all queries at one place so any query changes come in the future, I shouldn't build the app rather just need to modify the query.
Using a repository class is necessary. If you are using JPA i recommend using a repository for each Entity class. With JDBC it is possible to create a single repository which contains all the queries. To access the query methodes i would use a service class. In this way your code is structured well and maintainable for future changes.
I want to know if there's a way to configure the datasource for Ignite as Elastic Search. I was browsing the web. But I did not find a solution.
I want to implement this integration for a Java application.
If I understand your idea correctly there's a way to do it. As far as I can see Elasticsearch supports SQL table-like data access and it's available through jdbc connection. From the Ignite's side we have 3rd party persistance, it uses jdbc to connect to an underlying store system. To be honest I haven't tested it but I suppose it should work.
Also I need mention that you can use GridGain WebConsole to generate simple Ignite project from existing jdbc connection. This functionality could be found on Configuration tab -> Create Cluster Configuration.
Mule got inbuild object stores to cache data, But what is the purpose of using custom object stores under caching strategies? If possible, Please mention a usecase.
Custom object stores are useful when you want to use a custom persistence mechanism for your ObjectStore's
By default Mule provides two implementations, in-memory and a file based persistent store.
One possible use-case is, if you use Enterprise Edition have clustering enabled, you also have the ability to share these stores across multiple Mule nodes. However if you do not use EE or clustering but still want to share data between multiple Mule's, then you will need to use a persistent object store that can be shared across multiple mule nodes.
The ObjectStore interface has many implementations so you can choose a persistence mechanism that best suits you. Examples include Redis, Ehcache, Mongo, Cassandra, JDBC. More on this here:http://java.dzone.com/articles/synchronizing-data-across-mule
Ryan has given the correct explanation.. I just want to add:-
Mule uses object stores whenever it needs data to persist for later retrieval.
Custom Object store can be configure using Java classes and you can customize the Object store as per your need..
You can customize it and control your Cache and the Cache Keys, as well as store and retrieve the data, log you Cache keys and Cache contents, list you Cache keys etc from the Java class and that means full control on the Custom Object store ..
Please go through the following links :-
http://ricston.com/blog/cache-scope-ehcache/
http://java.dzone.com/articles/cache-scope-ehcache
http://www.mulesoft.org/documentation/display/current/Mule+Object+Stores
I was looking at the Laravel docs and I see a cache driver and a redis class. Looking at the cache class it seems like I could just use this to store things in Redis as I just change which driver I am using for caching to the already added Redis driver. However there is also a separate Redis class. Why is there a separate redis class? If the cache class can do the same thing and allow me to also swap which driver I use if ever needed, what reason is there to use the Redis class?
Maybe I am missing something here but I am just confused which one I want to use to store key's and data in redis? I am using Laravel 5.
From the documentation, the Cache class (Facade):
provides a unified API for various caching systems.
One of which is Redis. Another is Memcache. This class serves as a wrapper to abstract functionality to allow you to be technology agnostic. Ideally so you can swap out the underlying caching system without changing application code.
However, by abstracting you can lose functionality specific to a technology. So the Redis class is specific to Redis. If you require Redis specific functionality, you'd need to use this class directly.
I am trying to integrate a simple Enterprise App to a data source(xml file for now) using Apache Service Mix(ASM) ESB. Basically I need to have the ESB pick up content from the xml file and populate corresponding tables in a H2 database(which my app is linked to). I am not sure as to which features of ASM I should be using for the same. If someone could give me a high level idea as to how I should be going about the same I would be very grateful. I have looked at documentation from Fuse ESB and also the ASM documentation but at this point I am totally confused.
Thanks in advance.
Since ServiceMix uses Camel for such work, my first suggestion is to take a look at Apache Camel for it.
For you're example a simple route would look like this:
from("file:location_of_file").unmarshal(registered-jaxB-structure)
.split(simple("probably_your_entities")).to("jdbc:dataSource?sql_insert");
You read your incoming file from the *location_of_file* unmarshall it since it's a XML file to your object-structure with jaxb. After that you probably need to iterate over the entities inside your xml file which is best be done with a split. Now your structure is most likely in a way you can use either for storing with jpa, sql or jdbc.