Permissions 0660 for '/home/Vineet/.ssh/id_rsa' are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored. bad permissions: ignore key: /home/Vineet/.ssh/id_rsa Permission denied (publickey).
quick fix is to change the group on all existing entries:
inner class Builder is in charge of creating Customer instances
mandatory fields – either primitive (e.g. id) or annotated with @NotNull (e.g. lastName) – are part of the builder's constructor
all optional fields setter methods on the builder are provided
newly created Customer instance is validated using the Validator#validate() method
impossible to retrieve an invalid Customer instance
extract the validation routine into a base class:
abstract class AbstractBuilder<T>
T build() throws ConstraintViolationException
protected abstract T buildInternal();
private static Validator validator
Concrete builder classes have to
extend AbstractBuilder
must implement the buildInternal() method:
Builder extends AbstractBuilder<Customer>
@Override
protected Customer buildInternal()
Implementing the Builder Pattern using the Bean Validation API
variation of the Builder design pattern for instantiating objects with multiple optional attributes.
this pattern frees you from providing multiple constructors with the different optional attributes as parameters (hard to maintain and hard to read for clients)
or providing setter methods for the optional attributes
(require objects to be mutable, can leave objects in inconsistent state)