CQ5. How to know host name of publisher where code executes? - aem

To resolve problem mentioned in subject I wrote following code:
String link = externalizer.publishLink(resolverFactory.getAdministrativeResourceResolver(null),"");
I cannot check it because I have only author machine but following code will executes only on publishers.
On production we have several publisher.I want to get different results for every publisher.
Will my code work on publishers?

Have you defined sling:osgiConfig for the pid - com.day.cq.commons.impl.ExternalizerImpl?
You could configure this in OSGi console [1] directly as well.
In the configuration, you could supply dns name like 'publish http://www.example.com'
In case of multiple domain names for multiple publish instances, define sling:osgiConfig nodes for this service and attach it to 'run modes' of those publish instances. This should work.
On side note - Externalizer service is generally used for non-HTML content like email, etc. In HTML, you could use relative urls.
[1] http://localhost:4502/system/console/configMgr

Related

How to read multiple config file from Spring Cloud Config Server

Spring cloud config server supports reading property files with name ${spring.application.name}.properties. However I have 2 properties files in my application.
a.properties
b.properties
Can I get the config server to read both these properties files?
Rename your properties files in git or file system where your config server is looking at.
a.properties -> <your_application_name>.properties
a.properties -> <your_application_name>-<profile-name>.properties
For example, if your application name is test and you are running your application on dev profile, below two properties will be used together.
test.properties
test-dev.properties
Also you can specify additional profiles in bootstrap.properties of your config client to retrieve more properties files like below. For example,
spring:
profiles: dev
cloud:
config:
uri: http://yourconfigserver.com:8888
profile: dev,dev-db,dev-mq
If you specify like above, below all files will be used together.
test.properties
test-dev.properties
test-dev-db.prpoerties
test-dev-mq.properties
Note that the provided answer assumes your property files address different execution profiles. If they dont, i.e., your properties are split into different files for some other reason, e.g., maintenance purposes, divided by business/functional domain, or any other reason that suits your needs, then, by defining a profile for each such file, you are just "abusing" the profile feature, for achieving your goal (multiple property files per app).
You could then ask "OK, so what is the problem with that?". The problem is that you restrain yourself from various possibilities that you would otherwise have. If you actually want to customize your application configuration by profile you will have to create pseudo, sub, profiles for that since the file name is already a profile. Example:
Your application configuration could be customized by different profiles, which you use inside your springboot application (e.g. in #Profile() annotation), let them be dev, uat, prod. You can boot your application setting different profiles as active, e.g. 'dev' vs 'uat', and get the group of properties that you desire. For your a.properties b.properties and c.properties file, if different file names were supported, you would have a-dev.properties b-dev.properties and c-dev.properties files vs a-uat.properties b-uat.properties and c-uat.properties files for 'dev' and 'uat' profile.
Nevertheless, with the provided solution, you already have defined 3 profiles for each file: appname-a.properties appname-b.properties, and appname-c.properties: a, b, and c. Now imagine you have to create a different profile for each... profile(! it already shows something goes wrong here)! you would end up with a lot of profile permutations (which would get worse as files increase): The files would be appname-a-dev.properties, appname-b-dev.properties, app-c-dev.properties vs appname-a-uat.properties, appname-b-uat.properties, app-c-uat.properties, but the profiles would have been increased from ['dev', ' uat'] to ['a-dev', 'b-dev', 'c-dev', 'a-uat', 'b-uat', 'c-uat'] !!!
Even worse, how are you going to cope with all these profiles inside your code and more specifically your #Profile() annotations? Will you clutter the code space with "artificial" profiles just because you want to add one or two more different property files? It should have been sufficient to define your dev or uat profiles, where applicable, and define somewhere else the applicable property file names (which could then be further supported by profile, without any other configuration action), just as it happens in the externalized properties configuration for individual springboot apps
For argument completeness, I will just add here that if you want to switch to .yml property files one day, with the provided profile-based naming solution, you also loose the ability to define different "yaml document sections per profile" inside the same .yml file (Yes, in .yml you can have one property file yet define multiple logical yml documents inside, which its usually done for customizing the properties for different profiles, while having all related properties in one place). You loose the ability because you have already used the profile in the file name (appname-profile.yml)
I have issued a pull request with a minor fix for spring-cloud-config-server 1.4.x, which allows defining additionally supported file names (appart from "application[-profile]" and "{appname}[-profile]", that are currently supported) by providing a spring.cloud.congif.server.searchNames environment property - analogous to spring.config.name for springboot apps. I hope it gets reviewed and accepted.
I came across the same requirement lately with a little more constraint that I am not allowed to play around the environment profiles. So I wasn't allowed to do as the accepted answer. I'm sharing how I did it as an alternative to those who might have same case as me.
In my application, I have properties such as:
appxyz-data-soures.properties
appxyz-data-soures-staging.properties
appxyz-data-soures-production.properties
appxyz-interfaces.properties
appxyz-interfaces-staging.properties
appxyz-interfaces-production.properties
appxyz-feature.properties
appxyz-feature-staging.properties
appxyz-feature-production.properties
application.properties // for my use, contains local properties only
bootstrap.properties // for my use, contains management properties only
In my application, I have these particular properties set that allow me to achieve what I needed. But note I have the rest of needed config as well (enable cloud config, actuator refresh, eureka service discovery and so on) - just highlighting these for emphasis:
spring.application.name=appxyz
spring.cloud.config.name=appxyz-data-soures,appxyz-interfaces,appxyz-feature
You can observe that I didn't want to play around my application name but instead I used it as prefix for my config property files.
In my configuration server I configured in application.yml to capture pattern: 'appxyz-*':
spring:
cloud:
config:
server:
git:
uri: <git repo default>
repos:
appxyz:
pattern: 'appxyz-*'
uri: <another git repo if you have 1 repo per app>
private-key: ${git.appxyz.pk}
strict-host-key-checking: false
ignore-local-ssh-settings: true
private-key: ${git.default.pk}
In my Git repository I have the following. No application.properties and bootstrap because I didn't want those to be published and overridden/refreshed externally but you can do if you want.
appxyz-data-soures.properties
appxyz-data-soures-staging.properties
appxyz-data-soures-production.properties
appxyz-interfaces.properties
appxyz-interfaces-staging.properties
appxyz-interfaces-production.properties
appxyz-feature.properties
appxyz-feature-staging.properties
appxyz-feature-production.properties
It will be the pattern matching pattern: 'appxyz-*' that will capture and return the matching files from my git repository. The profile will also apply and fetch the correct property file accordingly. The prioritization of value is also preserved.
Furthermore, if you wish to add more file in your application (say appxyz-circuit-breaker.properties), we only need to do:
Add the name pattern in the spring.cloud.config.name=...,appxyz-circuit-breaker
The add the copies of the file locally and also externally (in the git repo.
No need to add/modify more or restart your configuration server later on. For new application, it's like a one time registration thing to add an entry under the repos of application.yml.
Hope it helps in one way or another!
In your application bootstrap.properties, you have to specify like below:
spring.application.name=a,b

sling run modes use?

what is the use of sling run modes property in sling.properties file?
I have a osgi felix bundle that installed onto aem admin bundle console through aem cq5 package manager.
**
configuration properties of one of the bundle service is not available
unless I put the following line in cq5/config/sling.properties file.
sling.run.modes=author,sandbox why is this so ? what is the importance
of sling.run.modes ?
**
Thank you,
Sri
Run modes allow you to tune your AEM instance for a specific purpose; for example author or publish, test, development, intranet or others.
Exampe: For dev: sling.run.modes=author,dev
use of run mode is, example - i have a config.author.prod and config.author.dev in crxd/e. Based on the run mode instance, the OSGI Bundle will pick the corresponding config.author.dev or prod configuration settings defined in nt:unstructured and start working.
Ref: https://docs.adobe.com/docs/en/cq/5-6-1/deploying/configure_runmodes.html
Ref: https://helpx.adobe.com/experience-manager/kb/RunModeDependentConfigAndInstall.html
Define a respository-based configuration for a single instance
There are two ways to configure CQ5.
Configure the Apache Felix Web Management Console
The configuration on the Apache Felix Web Management Console (http://:/system/console/configMgr) is always specific for the current instance.
You can find a description in the documentation: http://dev.day.com/content/docs/v5_2/html-resources/cq5_guide_system_administrator/ch05s03.html
Repository-based configuration
It is also possible to store configuration in the CRX repository as nodes of nodetype sling:OsgiConfig.
For more information, see http://dev.day.com/content/docs/v5_2/html-resources/cq5_guide_system_administrator/ch05s02.html
With this method, it is possible to share configuration among several instances.
The name of these nodes must be equal to the Persistent Identity (PID) of the configuration (for example, the name of the service). If you look at http://:/system/console/config, you see these names listed as service.pid properties. These configuration nodes have to be child-nodes of nodetype nt:folder with a name starting with config followed with a dot. All the run-modes that the config applies to are also separated with a dot.
Examples: config.author, config.publish, config.author.dev, config.author.foo.dev, and so on.

Query on DNS & connect to existing vm

In my current code base, when i create a VM, DNS name is being dynamically set as same as the instance name. For example, consider if my VM name is "anandInstance", DNS name of the name is being generated as "anandInstance.cloudapp.net". Is there a way to change the DNS name like "dns1.cloudapp.net" during the creation thru REST API??
"Connect to existing VM" , is it possible to achieve this option through REST call? In case "connect to existing.." option , we are getting a list of vms/services to choose and VM is getting created successfully. How to achieve the same using API.
Thanks
In my current code base, when i create a VM, DNS name is being
dynamically set as same as the instance name. For example, consider if
my VM name is "anandInstance", DNS name of the name is being generated
as "anandInstance.cloudapp.net". Is there a way to change the DNS name
like "dns1.cloudapp.net" during the creation thru REST API??
I don't think it is possible. Imagine what a nightmare in the portal would become if you were able to do so? How would you link a Cloud Service (whatever.cloudapp.net) to an actual deployment (MyDemoVm123). However you can use your own domain and have CNAME records pointing to your "want-to-change-for-some-reason.cloudapp.net" (frankly I surely think that soon we will use even longer names)
"Connect to existing VM" , is it possible to achieve this option
through REST call?
Connection to a VM is essentially opening a RDP session. If it a windows VM, you can try using the Download RDP file API call. Once you get the file, just start it with "process.start". If it is linux VM, just start SSH client on port 22 (or one you have defined) from the Cloud Service DNS name you have.
UPDATE
From the azure portal,for stand alone machineoption, we are able to give the dns name with deafult cloudoneapp.net. How to do the same
through the rest api call.any specfic paramter is there to specify the
same?
When you are using the REST API, you first create a Cloud Service (still named hosted service in the REST API) where your machine will be hosted. Here you give the name for that hosted service (the dns name with deafult cloudoneapp.net). Then you call the Create Virtual Machine Deployment API action.
In case "connect to existing.." option , we are getting a list of vms/services to choose and VM is getting created successfully. How to
achieve the same using API.
When you want to get list of all VMs, just get a list of all Hosted Services, then get properties of each and make a guess whether it is a VM or a Cloud Service (maybe by querying for Properties of each service). I don't see a direct access to the list of Virtual Machines. But as this feature being PREVIEW, things might change in the future.
Hope my answer is clear?

How can I make chef restart a service with additional parameters passed in?

I have a template for a Rails site for Sphinx configuration. There can be multiple different Sphinx services on the same machine running on different ports, one per app. Therefore, I I only want to restart Sphinx for each site if their corresponding configuration template changes. I've created an /etc/init.d/sphinx script that restarts just one sphinx based on a parameter similar to:
/etc/init.d/sphinx restart /etc/sphinx/site1.conf
Where site1.conf is defined by a Chef template. I'd really love to use the notifies functionality for Chef Templates to pass in the correct site1.conf parameter if the template changes. Is this possible?
Alternatively, I suppose I could just register a different service for each site similar to:
/etc/init.d/sphinx_site1
However, I'd prefer to pass in the parameters to the script instead.
When defining a service resource, you can customize the start, stop, and restart commands that will be run. You can define a service resource for each site that you have using these customized commands and set up their corresponding notifications.
For example:
service "sphinx_site1" do
supports :restart => true
restart_command "/etc/init.d/sphinx restart /etc/sphinx/site1.conf"
action :nothing
end
template "/etc/sphinx/site1.conf" do
notifies :restart, "service[sphix_site1]"
end

Change log file name during runtime - ent lib

I have a WCF service that will serve multiple clients. I'm using ent lib for the logging.
I'd like to have a different log file for each client. is there a way to change the file name back and forth?
I found a few threads but they all talk about editing the config file during runtime.
ALso found this: Enterprise Library Logging but it talks about environment variables. I will set the log name according to the client id.
Thanks
Avi
You can have distinct categories linked to individually configured FlatFile or RollingFile tracelisteners for each client.
If filenames are unknown till runtime, consider using fluent API for configuration, like so:
http://msdn.microsoft.com/en-us/library/ff664363(PandP.50).aspx#fluent_api_logging