com.github.jchanghong.http.okhttp.CancelCall.kt Maven / Gradle / Ivy

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/*
 * Copyright (C) 2014 Square, Inc.
 *
 * 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 com.github.jchanghong.http.okhttp

import okhttp3.OkHttpClient
import okhttp3.Request
import java.io.IOException
import java.util.concurrent.Executors
import java.util.concurrent.TimeUnit

class CancelCall {
	private val executor = Executors.newScheduledThreadPool(1)
	private val client = OkHttpClient()

	fun run() {
		val request = Request.Builder()
			.url("http://httpbin.org/delay/2") // This URL is served with a 2 second delay.
			.build()

		val startNanos = System.nanoTime()
		val call = client.newCall(request)

		// Schedule a job to cancel the call in 1 second.
		executor.schedule({
			System.out.printf("%.2f Canceling call.%n", (System.nanoTime() - startNanos) / 1e9f)
			call.cancel()
			System.out.printf("%.2f Canceled call.%n", (System.nanoTime() - startNanos) / 1e9f)
		}, 1, TimeUnit.SECONDS)

		System.out.printf("%.2f Executing call.%n", (System.nanoTime() - startNanos) / 1e9f)
		try {
			call.execute().use { response ->
				System.out.printf(
					"%.2f Call was expected to fail, but completed: %s%n",
					(System.nanoTime() - startNanos) / 1e9f, response
				)
			}
		} catch (e: IOException) {
			System.out.printf(
				"%.2f Call failed as expected: %s%n",
				(System.nanoTime() - startNanos) / 1e9f, e
			)
		}
	}
}

fun main() {
	CancelCall().run()
}