We have a web application configured by extending
GuiceServletContextListener. In addition to configuring the normal
ServletModule, we also have two private modules that extend MyBatisModule
and ShiroWebModule.
In the ShiroWebModule we load a properties file and bind the properties
like this:
...
@Override
public void configure() {
super.configure();
loadLDAPProperties(binder());
}
...
@SuppressWarnings("unchecked")
protected void configureShiroWeb() {
try {
this.
bindRealm().to(InjectableCasRealm.class);
ShiroWebModule.guiceFilterModule();
} catch (Exception e) {
addError(e);
}
// Key<RolesAuthorizationFilter> rolesFilter =
Key.get(RolesAuthorizationFilter.class);
expose(RolesAuthorizationFilter.class);
addFilterChain("/xyz.jsp", ANON);
...
Key<InjectableCasFilter> casFilter =
Key.get(InjectableCasFilter.class);
addFilterChain("/shiro-cas", casFilter);
expose(InjectableCasFilter.class);
}
...
private void loadLDAPProperties(Binder binder) {
props = new Properties();
try {
props.load(getClass().getClassLoader().getResourceAsStream(props_filename));
Names.bindProperties(binder, props);
} catch (IOException e) {
binder.addError(e);
}
}
We are then able to inject those properties into the InjectableCasRealm
class like this:
public class InjectableCasRealm extends CasRealm {
private String casServerUrl;
@Inject
public void setCasServerUrl(@Named("injCasRealm.casServerUrl") String
casServerUrl) {
this.casServerUrl = casServerUrl;
}
...
We would like to inject some of the properties into our servlet's
configured using the ServletModule but we keep getting this error:
SEVERE: Exception starting filter GuiceFilter
com.google.inject.ConfigurationException: Guice configuration errors:
1) Unable to create binding for java.lang.String annotated with
@com.google.inject.name.Named(value=heartbeat.logoutUrl). It was already
configured on one or more child injectors or private modules
bound at
com.trumpetinc.environment.HBShiroWebModule.loadLDAPProperties(HBShiroWebModule.java:79)
If it was in a PrivateModule, did you forget to expose the binding?
while locating java.lang.String annotated with
@com.google.inject.name.Named(value=heartbeat.logoutUrl)
for parameter 0 at
com.trumpetinc.heartbeat.HandleCheckHeartbeatRequest.setHeartbeatLogoutUrl(HandleCheckHeartbeatRequest.java:89)
at
com.trumpetinc.heartbeat.HandleCheckHeartbeatRequest.setHeartbeatLogoutUrl(HandleCheckHeartbeatRequest.java:89)
while locating com.trumpetinc.heartbeat.HandleCheckHeartbeatRequest
1 error
We can create a separate properties file with just the properties we need
and load/bind them in the ServletModule extension - but we though there
might be a better way.
How can we inject the properties loaded in the ShiroWebModule extension so
they can be used by our servlets?
Thank you - Richard
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