Add samples from camel pages

blog_notification_app/.devcontainer.json

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+{
+    "image": "ballerina/ballerina-devcontainer:2201.6.0-20230525-070000-e36fc7ac",
+    "extensions": ["WSO2.ballerina"],
+}

blog_notification_app/.gitignore

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+target
+generated
+Config.toml

blog_notification_app/Ballerina.toml

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+[package]
+org = "anjana"
+name = "blog_app"
+version = "0.1.0"
+distribution = "2201.6.0-20230525-070000-e36fc7ac"
+
+[build-options]
+observabilityIncluded = true

blog_notification_app/Dependencies.toml

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+# AUTO-GENERATED FILE. DO NOT MODIFY.
+
+# This file is auto-generated by Ballerina for managing dependency versions.
+# It should not be modified by hand.
+
+[ballerina]
+dependencies-toml-version = "2"
+distribution-version = "2201.6.0-20230525-070000-e36fc7ac"
+
+[[package]]
+org = "anjana"
+name = "blog_app"
+version = "0.1.0"
+dependencies = [
+	{org = "ballerina", name = "http"},
+	{org = "ballerina", name = "io"},
+	{org = "ballerinai", name = "observe"},
+	{org = "ballerinax", name = "slack"}
+]
+modules = [
+	{org = "anjana", packageName = "blog_app", moduleName = "blog_app"}
+]
+
+[[package]]
+org = "ballerina"
+name = "auth"
+version = "2.8.0"
+dependencies = [
+	{org = "ballerina", name = "crypto"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.array"},
+	{org = "ballerina", name = "lang.string"},
+	{org = "ballerina", name = "log"}
+]
+
+[[package]]
+org = "ballerina"
+name = "cache"
+version = "3.5.0"
+dependencies = [
+	{org = "ballerina", name = "constraint"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "task"},
+	{org = "ballerina", name = "time"}
+]
+
+[[package]]
+org = "ballerina"
+name = "constraint"
+version = "1.2.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "crypto"
+version = "2.3.1"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "time"}
+]
+
+[[package]]
+org = "ballerina"
+name = "file"
+version = "1.7.1"
+dependencies = [
+	{org = "ballerina", name = "io"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "os"},
+	{org = "ballerina", name = "time"}
+]
+
+[[package]]
+org = "ballerina"
+name = "http"
+version = "2.8.0"
+dependencies = [
+	{org = "ballerina", name = "auth"},
+	{org = "ballerina", name = "cache"},
+	{org = "ballerina", name = "constraint"},
+	{org = "ballerina", name = "crypto"},
+	{org = "ballerina", name = "file"},
+	{org = "ballerina", name = "io"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "jwt"},
+	{org = "ballerina", name = "lang.array"},
+	{org = "ballerina", name = "lang.decimal"},
+	{org = "ballerina", name = "lang.int"},
+	{org = "ballerina", name = "lang.regexp"},
+	{org = "ballerina", name = "lang.runtime"},
+	{org = "ballerina", name = "lang.string"},
+	{org = "ballerina", name = "lang.value"},
+	{org = "ballerina", name = "log"},
+	{org = "ballerina", name = "mime"},
+	{org = "ballerina", name = "oauth2"},
+	{org = "ballerina", name = "observe"},
+	{org = "ballerina", name = "time"},
+	{org = "ballerina", name = "url"}
+]
+modules = [
+	{org = "ballerina", packageName = "http", moduleName = "http"}
+]
+
+[[package]]
+org = "ballerina"
+name = "io"
+version = "1.4.1"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.value"}
+]
+modules = [
+	{org = "ballerina", packageName = "io", moduleName = "io"}
+]
+
+[[package]]
+org = "ballerina"
+name = "jballerina.java"
+version = "0.0.0"
+
+[[package]]
+org = "ballerina"
+name = "jwt"
+version = "2.8.0"
+dependencies = [
+	{org = "ballerina", name = "cache"},
+	{org = "ballerina", name = "crypto"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.int"},
+	{org = "ballerina", name = "lang.string"},
+	{org = "ballerina", name = "log"},
+	{org = "ballerina", name = "time"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.__internal"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.object"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.array"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.__internal"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.decimal"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.int"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.__internal"},
+	{org = "ballerina", name = "lang.object"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.object"
+version = "0.0.0"
+
+[[package]]
+org = "ballerina"
+name = "lang.regexp"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.runtime"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.string"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.regexp"}
+]
+
+[[package]]
+org = "ballerina"
+name = "lang.value"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "log"
+version = "2.7.1"
+dependencies = [
+	{org = "ballerina", name = "io"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.value"},
+	{org = "ballerina", name = "observe"}
+]
+
+[[package]]
+org = "ballerina"
+name = "mime"
+version = "2.7.1"
+dependencies = [
+	{org = "ballerina", name = "io"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.int"}
+]
+
+[[package]]
+org = "ballerina"
+name = "oauth2"
+version = "2.8.0"
+dependencies = [
+	{org = "ballerina", name = "cache"},
+	{org = "ballerina", name = "crypto"},
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "log"},
+	{org = "ballerina", name = "time"},
+	{org = "ballerina", name = "url"}
+]
+
+[[package]]
+org = "ballerina"
+name = "observe"
+version = "1.0.7"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "os"
+version = "1.6.0"
+dependencies = [
+	{org = "ballerina", name = "io"},
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "regex"
+version = "1.4.3"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "lang.string"}
+]
+
+[[package]]
+org = "ballerina"
+name = "task"
+version = "2.3.2"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "time"}
+]
+
+[[package]]
+org = "ballerina"
+name = "time"
+version = "2.2.4"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerina"
+name = "url"
+version = "2.2.4"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"}
+]
+
+[[package]]
+org = "ballerinai"
+name = "observe"
+version = "0.0.0"
+dependencies = [
+	{org = "ballerina", name = "jballerina.java"},
+	{org = "ballerina", name = "observe"}
+]
+modules = [
+	{org = "ballerinai", packageName = "observe", moduleName = "observe"}
+]
+
+[[package]]
+org = "ballerinax"
+name = "client.config"
+version = "1.0.1"
+dependencies = [
+	{org = "ballerina", name = "http"},
+	{org = "ballerina", name = "oauth2"}
+]
+
+[[package]]
+org = "ballerinax"
+name = "slack"
+version = "3.3.0"
+dependencies = [
+	{org = "ballerina", name = "http"},
+	{org = "ballerina", name = "lang.runtime"},
+	{org = "ballerina", name = "log"},
+	{org = "ballerina", name = "mime"},
+	{org = "ballerina", name = "os"},
+	{org = "ballerina", name = "regex"},
+	{org = "ballerina", name = "url"},
+	{org = "ballerinax", name = "client.config"}
+]
+modules = [
+	{org = "ballerinax", packageName = "slack", moduleName = "slack"}
+]
+

blog_notification_app/README.md

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+# Blog Notification Application
+
+This application demonstrates how to write a simple blog backend application using Ballerina. It also sends slack notification to a slack channel when a new blog is added.
+
+## Prerequisites
+
+### Setting up Slack tokens
+1. Visit https://api.slack.com/apps 
+2. Click `Create New App` and select the `From scratch` option.
+3. Create the app by providing an `App name` and selecting the workspace on where to send the notifications. 
+4. In the `Add features and functionality` section, Click `Permissions`.
+5. Go to the `Scopes` section and add necessary OAuth scopes in `User Token Scopes` section. (`channels:history`, `channels:read`, `channels:write`, `chat:write`, `emoji:read`, `files:read`, `files:write`, `groups:read`, `reactions:read`, `users:read`, `users:read.email`)
+6. Go back to the `Basic Information` section of your Slack App. Then go to the `Install your app section` and install the app to the workspace by clicking the `Install to Workspace` button.
+7. Get your User OAuth token from the `OAuth & Permissions` section of your Slack App
+
+
+### Configuring the Slack token
+1. Create a file named `Config.toml` in the blog_app directory and add the following content to it. Replace the `slackToken` with the token you got from the previous step.
+
+```
+slackToken = <token>
+```
+
+## Running the Sample
+
+- Run the ballerina application `bal run`
+
+## Testing the Sample
+
+
+- Create a blog
+```
+curl --location 'http://localhost:9090/blog' \
+--header 'Content-Type: application/json' \
+--data-raw '{
+    "title": "Sample Blog",
+    "content": "This is a sample blog"
+}'
+```
+- You should see a slack notification in the configured slack channel.