Class ServiceBindingPropertySource

java.lang.Object

org.apache.tomcat.util.digester.ServiceBindingPropertySource

All Implemented Interfaces:

IntrospectionUtils.PropertySource, IntrospectionUtils.SecurePropertySource

public class ServiceBindingPropertySource
extends Object
implements IntrospectionUtils.SecurePropertySource

A IntrospectionUtils.SecurePropertySource that uses Kubernetes service bindings to resolve expressions.

The Kubernetes service binding specification can be found at https://servicebinding.io/.

Usage example:

Configure the certificate with a service binding. When the service binding is constructed as follows:

    $SERVICE_BINDING_ROOT/
                         /custom-certificate/
                                            /keyFile
                                            /file
                                            /chainFile
                                            /keyPassword
 

   
     <SSLHostConfig>
           <Certificate certificateKeyFile="${custom-certificate.keyFile}"
                        certificateFile="${custom-certificate.file}"
                        certificateChainFile="${custom-certificate.chainFile}"
                        certificateKeyPassword="${chomp:custom-certificate.keyPassword}"
                        type="RSA" />
     </SSLHostConfig> 
 

The optional chomp: prefix will cause the ServiceBindingPropertySource to trim a single newline (\r\n, \r, or \n) from the end of the file, if it exists. This is a convenience for hand-edited files/values where removing a trailing newline is difficult, and trailing whitespace changes the meaning of the value.

How to configure:

 
   echo "org.apache.tomcat.util.digester.PROPERTY_SOURCE=org.apache.tomcat.util.digester.ServiceBindingPropertySource" >> conf/catalina.properties
 

or add this to CATALINA_OPTS

 
   -Dorg.apache.tomcat.util.digester.PROPERTY_SOURCE=org.apache.tomcat.util.digester.ServiceBindingPropertySource
 

NOTE: When configured the PropertySource for resolving expressions from system properties is still active.

See Also:

• Digester
• Tomcat Configuration Reference System Properties

Constructor Summary

Constructors

Constructor	Description
ServiceBindingPropertySource()

Method Summary

Modifier and Type	Method	Description
String	getProperty(String key)
String	getProperty(String key, ClassLoader classLoader)	Obtain a property value, checking that code associated with the provided class loader has permission to access the property.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ServiceBindingPropertySource

public ServiceBindingPropertySource()

Method Details

getProperty

public String getProperty(String key)

Specified by:

getProperty in interface IntrospectionUtils.PropertySource

getProperty

public String getProperty(String key,
 ClassLoader classLoader)

Description copied from interface: IntrospectionUtils.SecurePropertySource

Obtain a property value, checking that code associated with the provided class loader has permission to access the property. If the classLoader is null or if classLoader does not implement PermissionCheck then the property value will be looked up without a call to PermissionCheck.check(java.security.Permission)

Specified by:

getProperty in interface IntrospectionUtils.SecurePropertySource

Parameters:

key - The key of the requested property

classLoader - The class loader associated with the code that trigger the property lookup

Returns:

The property value or null if it could not be found or if PermissionCheck.check(java.security.Permission) fails