https://github.com/ReactiveX/RxJava: Reactive Extensions for Java
  • David Karnok 
Copyright (c) 2016-present, RxJava Contributors.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is
distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
the License for the specific language governing permissions and limitations under the License.

/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
 * the License for the specific language governing permissions and limitations under the License.
 */
package io.reactivex;

import io.reactivex.annotations.*;


A functional interface that has a subscribe() method that receives an instance of a MaybeEmitter instance that allows pushing an event in a cancellation-safe manner. 
Type parameters:
  • <T> – the value type pushed
/**
 * A functional interface that has a {@code subscribe()} method that receives
 * an instance of a {@link MaybeEmitter} instance that allows pushing
 * an event in a cancellation-safe manner.
 *
 * @param <T> the value type pushed
 */
public interface MaybeOnSubscribe<T> {

    
Called for each MaybeObserver that subscribes.

Params:
  • emitter – the safe emitter instance, never null
Throws:
/**
     * Called for each MaybeObserver that subscribes.
     * @param emitter the safe emitter instance, never null
     * @throws Exception on error
     */
    void subscribe(@NonNull MaybeEmitter<T> emitter) throws Exception;
}