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javajava-stream

Execute Consumers in a row

I have a couple of Consumer<MyObject> classes I want to execute in sequence. I know I can do this with myConsumer1.andThen(myConsumer2).accept(myvalue). How can I do this if I have a List<Consumer<MyObject>> and the number of consumers is unknown?

Here is a for-loop solution that I think is not concise:

Consumer<MyObject> result;
for (Consumer<MyObject> consumer : consumers) {
    if(result == null) {
        result = consumer;
    } else {
        result.andThen(consumer);
    }
}
result.apply(myvalue);
Solution

  • Loop through the list and apply each consumer to myValue.

    for (Consumer<MyObject> consumer : consumerList) {
    consumer.accept(myValue);
}