*Short version:*
How can I do this generically without telling Guice ahead of time what the
string values in the @Named annotation are?
@Inject
@Named("*contentServer*") // "contentServer" not known by Guice at compile
time
public SSHClient contentServer;
@Inject
@Named("*testnode1*") // "testnode1" not known by Guice at compile time
public SSHClient testnode1;
Where "*contentServer*" and '*testnode1*' map to a set of properties loaded
at runtime, such as:
#From test.properties file
ssh.clients=*contentServer*,*testnode01*
*contentServer*.ssh.username=<csUser>
*contentServer*.ssh.password=<csPwd>
*contentServer*.ssh.hostname=contentServer.test.com
*testnode01*.ssh.username=<nodeuser1>
*testnode01*.ssh.password=<nodepwd1>
*testnode01*.ssh.hostname=testnode01.test.com
*Longer Version:*
I'm using TestNG with the @Guice annotation and a single GuiceModule class
with a single @Provides method (below) to facilitate injecting SSH Client
instances into the test classes. The Guice Module is shared and used by
many test classes, each having different SSHClient needs. My current Guice
provider only supports a single SSHClient node (no @Named support) based on
a common set of properties and looks like the following:
*//From GuiceModule *
Properties config = null;
@Override
protected void configure() {
loadConfig();
Names.bindProperties(binder(), config);
}
@Provides
@Named("CONFIG")
@Singleton
public Properties ConfigProvider() {
return config;
}
*//GuiceModule SSHCLient provider method*
@Provides
public SSHClient sshClientProvider(@Named("CONFIG") Properties config) {
String hostname;
String username;
String password;
hostname = config.getProperty("ssh.hostname");
username = config.getProperty("ssh.username");
password = config.getProperty("ssh.password");
SSHClient ssh = null;
if (hostname != null && username != null && password != null) {
try {
ssh = new SSHClient(hostname, username, password);
} catch (Exception ex) {
System.out.println(String.format("[WARN] Exception creating
SSHClient instance: host %s: user %s: Message: %s", hostname, username,
ex.getMessage()));
}
}
return ssh;
}
I hoped to make it more dynamic based on the properties file definitions to
support multiple SSHClient @Named instances using unique prefixes for each
node. The shared Guice module won't know what prefixes are defined because
each test implementation uses SSH instances for different purposes.
I haven't seen any examples that match (in my limited understanding at
least) how I could create such providers dynamically at runtime.
Any pointers/thoughts on how I could support this are much appreciated!
-Jeff
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