...
Code Block |
---|
language | java |
---|
title | Serializer |
---|
linenumbers | true |
---|
|
public interface Serializer<T> extends Closeable {
void configure(Map<String, ?> configs, boolean isKey);
default byte[] serialize(String topic, T data) {
return new byte[0];
}
default byte[] serialize(String topic, Headers headers, T data) { // This is the new method
return serialize(topic, data);
}
@Override
void close();
} |
...
Code Block |
---|
language | java |
---|
title | Deserializer |
---|
linenumbers | true |
---|
|
public interface Deserializer<T> extends Closeable {
void configure(Map<String, ?> configs, boolean isKey);
default T deserialize(String topic, byte[] data) {
return null;
}
default T deserialize(String topic, Headers headers, byte[] data) { // This is the new method
return deserialize(topic, data);
}
@Override
void close();
} |
...
The code examples here are made with the Deserializer
class but they are completely valid for the Serializer
as well.
Default Implementations for the "headerless" methods
There are options to provide a default implementation: return a dummy value or throw an exception as shown below. This means that we'll have an interface where there are no methods enforced. Furthermore we should somehow suggest users that which method should they implement. To achieve this we could deprecate the 2 parameter ("headerless") method but this would litter the code base with warnings as we're still using this method in a lot of places (like the serializers and deserializers).
Code Block |
---|
language | java |
---|
title | Serializer |
---|
linenumbers | true |
---|
|
public interface Serializer<T> extends Closeable {
void configure(Map<String, ?> configs, boolean isKey);
@Deprecated
default byte[] serialize(String topic, T data) {
return new byte[0];
// throw new UnsupportedOperationException("Method not implemented");
}
default byte[] serialize(String topic, Headers headers, T data) { // This is the new method
return serialize(topic, data);
}
@Override
void close();
} |
Code Block |
---|
language | java |
---|
title | Deserializer |
---|
linenumbers | true |
---|
|
public interface Deserializer<T> extends Closeable {
void configure(Map<String, ?> configs, boolean isKey);
@Deprecated
default T deserialize(String topic, byte[] data) {
return null;
// throw new UnsupportedOperationException("Method not implemented");
}
default T deserialize(String topic, Headers headers, byte[] data) { // This is the new method
return deserialize(topic, data);
}
@Override
void close();
} |
Propagate to more complicated
...