Incorrect instructions for API Intro Example

[bame-da]

@gleber-da Submitted this one via the support widget from https://docs.daml.com/app-dev/ledger-api-introduction/index.html#example-project-ping-pong:

As per recommendation in the screenshot, I did the following:

~/tmp ❯❯❯ ls
~/tmp ❯❯❯ da new example-ping-pong-grpc-java ping-pong-java
quickstart-java  Built-in template for version: 100.11.23
~/tmp ❯❯❯ ls
~/tmp ❯❯❯

The promised directory is nowhere to be found and the command output is not explaining what has happened.

I can confirm the above behaviour. The command da new example-ping-pong-grpc-java ping-pong-java seems to result in the available templates being listed which is rather odd. Not worth fixing in the old assistant anymore, but worth being aware that bad da new commands result in no error message.

We should simply change the instructions to get the example form GitHub. I think the API example has been merged with the java examples into https://github.com/digital-asset/ex-java-bindings. @gerolf-da @pajb-da, could you confirm?

[gerolf-da]

@bame-da: should the java-bindings simply refer to quickstart in terms of "for an example, look at quickstart"?

[bethaitman-da]

I think this might be worth a bigger rethink, yes; for the meantime, I think this is an easy fix, so I'll do a PR to get it working again.

[gerolf-da]

@bethaitman-da: In the PR I removed all references to the ping-pong templates, since they are not even in the DAML repo anymore and thus also aren't checked on commit.

[gerolf-da]

Fixed by #216. The instructions now point to the java bindings examples on GitHub. Thanks @bethaitman-da.