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new 1d2e4e566 migrate and improve knative example
1d2e4e566 is described below
commit 1d2e4e566195a5c6692c5f730a25d52e652f5cd5
Author: Kuthumi Pepple <kuthumipep...@gmail.com>
AuthorDate: Tue Aug 23 17:11:07 2022 +0100
migrate and improve knative example
---
examples/README.md | 8 --
examples/knative/README.md | 134 ---------------------------------
examples/knative/feed.groovy | 22 ------
examples/knative/messages-channel.yaml | 21 ------
examples/knative/printer.groovy | 21 ------
examples/knative/reader.groovy | 20 -----
examples/knative/splitter.groovy | 22 ------
examples/knative/words-channel.yaml | 21 ------
examples/knative/writer.groovy | 21 ------
9 files changed, 290 deletions(-)
diff --git a/examples/README.md b/examples/README.md
index 7ba5a016e..341f447b1 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -15,14 +15,6 @@ In this section you will find the most basic examples.
Useful to start learning
| Modeline | [Camel K modeline
support](https://camel.apache.org/camel-k/latest/cli/modeline.html) | [see
examples](./modeline/)|
| Volumes | Produce/Consume files attached to a `PVC` | [see
examples](./volumes/)|
-## Component usage examples
-
-In this section you can find a few examples of certain [`Camel`
components](https://camel.apache.org/components/latest/index.html). This is a
limited number of the wide variety of components supported by Apache Camel. You
can also find useful examples [in this
repository](https://github.com/apache/camel-k-examples).
-
-| Type | Description | Link |
-|---|---|---|
-| Knative | Component usage | [see examples](./knative/)|
-
## Advanced usage examples
As soon as you will learn the basic stuff, you will like to try the new
advanced feature offered by Camel K. Here a few examples:
diff --git a/examples/knative/README.md b/examples/knative/README.md
deleted file mode 100644
index ace3fe552..000000000
--- a/examples/knative/README.md
+++ /dev/null
@@ -1,134 +0,0 @@
-# Knative Camel K Example
-This example shows how Camel K can be used to connect Knative building blocks
to create awesome applications.
-
-A video version of this [demo is available on
YouTube](https://youtu.be/btf_e2GniXM).
-
-It's assumed that both Camel K and Knative are properly installed (including
Knative Build, Serving and Eventing) into the cluster.
-Refer to the specific documentation to install and configure all components.
-
-We're going to create two channels:
-- messages
-- words
-
-The first channel will contain phrases, while the second one will contains the
single words contained in the phrases.
-
-To create the channels (they use the in-memory channel provisioner):
-
-```
-kubectl create -f messages-channel.yaml
-kubectl create -f words-channel.yaml
-```
-
-We can now proceed to install all camel K integrations.
-
-## Install a "Printer"
-
-We'll install a Camel K integration that will print all words from the `words`
channel.
-
-Writing a "function" that does this is as simple as writing:
-
-```
-from('knative:channel/words')
- .convertBodyTo(String.class)
- .to('log:info')
-```
-
-You can run this integration by running:
-
-```
-kamel run printer.groovy
-```
-
-Under the hood, the Camel K operator does this:
-- Understands that the integration is passive, meaning that it can be
activated only using an external HTTP call (the knative consumer endpoint)
-- Materializes the integration as a Knative autoscaling service, integrated in
the Istio service mesh
-- Adds a Knative Eventing `Subscription` that points to the autoscaling service
-
-The resulting integration will be scaled to 0 when not used (if you wait ~5
minutes, you'll see it).
-
-## Install a "Splitter"
-
-We're now going to deploy a splitter, using the Camel core Split EIP. The
splitter will take all messages from the `messages` channel,
-split them and push the single words into the `words` channel.
-
-The integration code is super simple:
-
-```
-from('knative:channel/messages')
- .split().tokenize(" ")
- .log('sending ${body} to words channel')
- .to('knative:channel/words')
-```
-
-Let's run it with:
-
-```
-kamel run splitter.groovy
-```
-
-This integration will be also materialized as a Knative autoscaling service,
because the only entrypoint is passive (waits for a push notification).
-
-## Install a "Feed"
-
-We're going to feed this chain of functions using a timed feed like this:
-
-```
-from('timer:clock?period=3000')
- .setBody().constant("Hello World from Camel K")
- .to('knative:channel/messages')
- .log('sent message to messages channel')
-```
-
-Every 3 seconds, the integration sends a message to the Knative `messages`
channel.
-
-Let's run it with:
-
-```
-kamel run feed.groovy
-```
-
-This cannot be materialized into an autoscaling service, but the operator
understands it automatically and maps it to a plain Kubernetes Deployment
-(Istio sidecar will be injected).
-
-## Playing around
-
-If you've installed all the services, you'll find that the printer pod will
print single words as they arrive from the feed (every 3 seconds, passing by
the splitter function).
-
-If you now stop the feed integration (`kamel delete feed`) you will notice
that the other services (splitter and printer) will scale down to 0 in few
minutes.
-
-And if you reinstall the feed again (`kamel run feed.groovy`), the other
integration will scale up again as soon as they receive messages (splitter
first, then printer).
-
-## Playing harder
-
-You can also play with different kind of feeds. E.g. the following simple feed
can be used to bind messages from Telegram to the system:
-
-```
-from('telegram:bots/<put-here-your-botfather-authorization>')
- .convertBodyTo(String.class)
- .to('log:info')
- .to('knative:channel/messages')
-```
-
-Now just send messages to your bot with the Telegram client app to see all
single words appearing in the printer service.
-
-You can also replace the printer with a Slack-based printer like:
-
-```
-from('knative:channel/words')
- .log('Received: ${body}')
- .to('slack:#camel-k-tests')
-
-
-camel {
- components {
- slack {
- webhookUrl '<put-here-your-slack-incoming-webhook-url>'
- }
- }
-}
-```
-
-Now the single words will be printed in the log but also forwarded to the
-slack channel named `#camel-k-tests`.
-
-You have infinite possibilities with Camel!
diff --git a/examples/knative/feed.groovy b/examples/knative/feed.groovy
deleted file mode 100644
index a456c8b78..000000000
--- a/examples/knative/feed.groovy
+++ /dev/null
@@ -1,22 +0,0 @@
-// camel-k: language=groovy
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-from('timer:clock?period=3000')
- .setBody().constant("Hello World from Camel K")
- .to('knative:channel/messages')
- .log('sent message to messages channel')
diff --git a/examples/knative/messages-channel.yaml
b/examples/knative/messages-channel.yaml
deleted file mode 100644
index c67517d92..000000000
--- a/examples/knative/messages-channel.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-# ---------------------------------------------------------------------------
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements. See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License. You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ---------------------------------------------------------------------------
-
-apiVersion: messaging.knative.dev/v1
-kind: InMemoryChannel
-metadata:
- name: messages
diff --git a/examples/knative/printer.groovy b/examples/knative/printer.groovy
deleted file mode 100644
index fa3aa8f2d..000000000
--- a/examples/knative/printer.groovy
+++ /dev/null
@@ -1,21 +0,0 @@
-// camel-k: language=groovy
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-from('knative:channel/words')
- .convertBodyTo(String.class)
- .to('log:info')
diff --git a/examples/knative/reader.groovy b/examples/knative/reader.groovy
deleted file mode 100644
index 2a965607c..000000000
--- a/examples/knative/reader.groovy
+++ /dev/null
@@ -1,20 +0,0 @@
-// camel-k: language=groovy
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-from('knative:endpoint/reader')
- .log('got ${body}')
\ No newline at end of file
diff --git a/examples/knative/splitter.groovy b/examples/knative/splitter.groovy
deleted file mode 100644
index 4bde12cb7..000000000
--- a/examples/knative/splitter.groovy
+++ /dev/null
@@ -1,22 +0,0 @@
-// camel-k: language=groovy
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-from('knative:channel/messages')
- .split().tokenize(" ")
- .log('sending ${body} to words channel')
- .to('knative:channel/words')
\ No newline at end of file
diff --git a/examples/knative/words-channel.yaml
b/examples/knative/words-channel.yaml
deleted file mode 100644
index 2bd81ffec..000000000
--- a/examples/knative/words-channel.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-# ---------------------------------------------------------------------------
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements. See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License. You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ---------------------------------------------------------------------------
-
-apiVersion: messaging.knative.dev/v1
-kind: InMemoryChannel
-metadata:
- name: words
diff --git a/examples/knative/writer.groovy b/examples/knative/writer.groovy
deleted file mode 100644
index a452f4c30..000000000
--- a/examples/knative/writer.groovy
+++ /dev/null
@@ -1,21 +0,0 @@
-// camel-k: language=groovy
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-from('timer:messages?period=10000')
- .setBody().constant('the-body')
- .to('knative:endpoint/reader')
