Dynamic proxy for suspend methods?
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This is my interface:
interface BlogService {
suspend fun tag() : JsonObject
}
Is it possible to create a dynamic proxy for the suspend method and run coroutine inside?
I can't use "Proxy.newProxyInstance" from jdk because I get a compilation error (suspend function should be run from another suspend function)
kotlin
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
add a comment |
This is my interface:
interface BlogService {
suspend fun tag() : JsonObject
}
Is it possible to create a dynamic proxy for the suspend method and run coroutine inside?
I can't use "Proxy.newProxyInstance" from jdk because I get a compilation error (suspend function should be run from another suspend function)
kotlin
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
add a comment |
This is my interface:
interface BlogService {
suspend fun tag() : JsonObject
}
Is it possible to create a dynamic proxy for the suspend method and run coroutine inside?
I can't use "Proxy.newProxyInstance" from jdk because I get a compilation error (suspend function should be run from another suspend function)
kotlin
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
This is my interface:
interface BlogService {
suspend fun tag() : JsonObject
}
Is it possible to create a dynamic proxy for the suspend method and run coroutine inside?
I can't use "Proxy.newProxyInstance" from jdk because I get a compilation error (suspend function should be run from another suspend function)
kotlin
kotlin
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
asked Nov 16 '18 at 19:48
mystdeimmystdeim
1,53652853
1,53652853
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I had the same problem. And I think the answer is Yes. Here's what I figured out.
The following interface
interface IService {
suspend fun hello(arg: String): Int
}
is compiled into this
interface IService {
fun hello(var1: String, var2: Continuation<Int>) : Any
}
after compilation, there's no difference between a normal function and a suspend
function, except that the latter one has an additional argument of type
Continuation. Just return COROUTINE_SUSPENDED in the delegated
InvocationHandler.invoke if you actually want it supended.
Here's an example of creating an ISerivce instance via the java dynamic proxy
facility Proxy.newProxyInstance
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Proxy
import kotlin.coroutines.Continuation
import kotlin.coroutines.intrinsics.COROUTINE_SUSPENDED
import kotlin.coroutines.resume
fun getServiceDynamic(): IService {
val proxy = InvocationHandler { _, method, args ->
val lastArg = args?.lastOrNull()
if (lastArg is Continuation<*>) {
val cont = lastArg as Continuation<Int>
val argsButLast = args.take(args.size - 1)
doSomethingWith(method, argsButLast, onComplete = { result: Int ->
cont.resume(result)
})
COROUTINE_SUSPENDED
} else {
0
}
}
return Proxy.newProxyInstance(
proxy.javaClass.classLoader,
arrayOf(IService::class.java),
proxy
) as IService
}
I believe this code snippet is simple enough and self-explaining.
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I had the same problem. And I think the answer is Yes. Here's what I figured out.
The following interface
interface IService {
suspend fun hello(arg: String): Int
}
is compiled into this
interface IService {
fun hello(var1: String, var2: Continuation<Int>) : Any
}
after compilation, there's no difference between a normal function and a suspend
function, except that the latter one has an additional argument of type
Continuation. Just return COROUTINE_SUSPENDED in the delegated
InvocationHandler.invoke if you actually want it supended.
Here's an example of creating an ISerivce instance via the java dynamic proxy
facility Proxy.newProxyInstance
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Proxy
import kotlin.coroutines.Continuation
import kotlin.coroutines.intrinsics.COROUTINE_SUSPENDED
import kotlin.coroutines.resume
fun getServiceDynamic(): IService {
val proxy = InvocationHandler { _, method, args ->
val lastArg = args?.lastOrNull()
if (lastArg is Continuation<*>) {
val cont = lastArg as Continuation<Int>
val argsButLast = args.take(args.size - 1)
doSomethingWith(method, argsButLast, onComplete = { result: Int ->
cont.resume(result)
})
COROUTINE_SUSPENDED
} else {
0
}
}
return Proxy.newProxyInstance(
proxy.javaClass.classLoader,
arrayOf(IService::class.java),
proxy
) as IService
}
I believe this code snippet is simple enough and self-explaining.
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
add a comment |
I had the same problem. And I think the answer is Yes. Here's what I figured out.
The following interface
interface IService {
suspend fun hello(arg: String): Int
}
is compiled into this
interface IService {
fun hello(var1: String, var2: Continuation<Int>) : Any
}
after compilation, there's no difference between a normal function and a suspend
function, except that the latter one has an additional argument of type
Continuation. Just return COROUTINE_SUSPENDED in the delegated
InvocationHandler.invoke if you actually want it supended.
Here's an example of creating an ISerivce instance via the java dynamic proxy
facility Proxy.newProxyInstance
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Proxy
import kotlin.coroutines.Continuation
import kotlin.coroutines.intrinsics.COROUTINE_SUSPENDED
import kotlin.coroutines.resume
fun getServiceDynamic(): IService {
val proxy = InvocationHandler { _, method, args ->
val lastArg = args?.lastOrNull()
if (lastArg is Continuation<*>) {
val cont = lastArg as Continuation<Int>
val argsButLast = args.take(args.size - 1)
doSomethingWith(method, argsButLast, onComplete = { result: Int ->
cont.resume(result)
})
COROUTINE_SUSPENDED
} else {
0
}
}
return Proxy.newProxyInstance(
proxy.javaClass.classLoader,
arrayOf(IService::class.java),
proxy
) as IService
}
I believe this code snippet is simple enough and self-explaining.
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
add a comment |
I had the same problem. And I think the answer is Yes. Here's what I figured out.
The following interface
interface IService {
suspend fun hello(arg: String): Int
}
is compiled into this
interface IService {
fun hello(var1: String, var2: Continuation<Int>) : Any
}
after compilation, there's no difference between a normal function and a suspend
function, except that the latter one has an additional argument of type
Continuation. Just return COROUTINE_SUSPENDED in the delegated
InvocationHandler.invoke if you actually want it supended.
Here's an example of creating an ISerivce instance via the java dynamic proxy
facility Proxy.newProxyInstance
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Proxy
import kotlin.coroutines.Continuation
import kotlin.coroutines.intrinsics.COROUTINE_SUSPENDED
import kotlin.coroutines.resume
fun getServiceDynamic(): IService {
val proxy = InvocationHandler { _, method, args ->
val lastArg = args?.lastOrNull()
if (lastArg is Continuation<*>) {
val cont = lastArg as Continuation<Int>
val argsButLast = args.take(args.size - 1)
doSomethingWith(method, argsButLast, onComplete = { result: Int ->
cont.resume(result)
})
COROUTINE_SUSPENDED
} else {
0
}
}
return Proxy.newProxyInstance(
proxy.javaClass.classLoader,
arrayOf(IService::class.java),
proxy
) as IService
}
I believe this code snippet is simple enough and self-explaining.
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
I had the same problem. And I think the answer is Yes. Here's what I figured out.
The following interface
interface IService {
suspend fun hello(arg: String): Int
}
is compiled into this
interface IService {
fun hello(var1: String, var2: Continuation<Int>) : Any
}
after compilation, there's no difference between a normal function and a suspend
function, except that the latter one has an additional argument of type
Continuation. Just return COROUTINE_SUSPENDED in the delegated
InvocationHandler.invoke if you actually want it supended.
Here's an example of creating an ISerivce instance via the java dynamic proxy
facility Proxy.newProxyInstance
import java.lang.reflect.InvocationHandler
import java.lang.reflect.Proxy
import kotlin.coroutines.Continuation
import kotlin.coroutines.intrinsics.COROUTINE_SUSPENDED
import kotlin.coroutines.resume
fun getServiceDynamic(): IService {
val proxy = InvocationHandler { _, method, args ->
val lastArg = args?.lastOrNull()
if (lastArg is Continuation<*>) {
val cont = lastArg as Continuation<Int>
val argsButLast = args.take(args.size - 1)
doSomethingWith(method, argsButLast, onComplete = { result: Int ->
cont.resume(result)
})
COROUTINE_SUSPENDED
} else {
0
}
}
return Proxy.newProxyInstance(
proxy.javaClass.classLoader,
arrayOf(IService::class.java),
proxy
) as IService
}
I believe this code snippet is simple enough and self-explaining.
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
answered Jan 3 at 12:28
Jinxin ZhengJinxin Zheng
112
112
add a comment |
add a comment |
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