examples/dagger/src/coffee/CoffeeMaker.kt

/*
 * Copyright 2018 The Bazel Authors. All rights reserved.
 *
 * 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 coffee

import dagger.Lazy
import kotlinx.coroutines.experimental.DefaultDispatcher
import kotlinx.coroutines.experimental.withContext
import javax.inject.Inject

class CoffeeMaker @Inject internal constructor(
    // Create a possibly costly heater only when we use it.
    private val heater: Lazy<Heater>,
    private val pump: Pump
) {

    suspend fun brew() {
        // this function is async to verify intellij support for coroutines.
        withContext(DefaultDispatcher) {
            heater.get().on()
            pump.pump()
            println(" [_]P coffee! [_]P ")
            heater.get().off()
        }
    }
}