Slide 1
Slide 1 text
Retrofit2ͷΈ
Androidݚڀ&ൃදձ #3
2019/11/30
ʙCallAdapterΛཧղ͢Δʙ
Slide 2
Slide 2 text
• Տຊ ହ(͔Θͱ ͔ͨ͢)
• ॴଐɿגࣜձࣾ tech vein
(େࡕࢢதԝ۠ຊொ)
• ϞόΠϧΞϓϦΤϯδχΞ
(AndroidଟΊɺiOSŧŔŕŪũƄŝſ)
• ͬͨ͜ͱ͋Δ
HTTPΫϥΠΞϯτϥΠϒϥϦ
- AndroidQuery,Volley,OkHttp,Retrofit
2
ࣗݾհ
Slide 3
Slide 3 text
Retrofitͱ
Slide 4
Slide 4 text
• Squareࣾ
• HTTPΫϥΠΞϯτ
• 2016ʹv2ϦϦʔε
• 2019/11/30 ݱࡏ2.6.1
• JavaϥΠϒϥϦ
• Android or JavaͰॻ͔ΕͨαʔόʔͰಈ͘
• GitHubελʔ34.3k
Retrofitͱ
Slide 5
Slide 5 text
RetrofitͷΞΠσΞ
interface ApiService {
}
Slide 6
Slide 6 text
RetrofitͷΞΠσΞ
interface ApiService {
}
class HttpGitHubService : ApiService {
// …
}
Slide 7
Slide 7 text
RetrofitͷΞΠσΞ
interface ApiService {
}
Slide 8
Slide 8 text
RetrofitͷΞΠσΞ(ྫ)
interface GitHubServiceWithoutRetrofit {
suspend fun listRepos(user: String): List
}
Slide 9
Slide 9 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
Slide 10
Slide 10 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
URL
Λࢦఆ
Slide 11
Slide 11 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
URL
Λࢦఆ
openConnneciton
ͨ͠Γ
Slide 12
Slide 12 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
URL
Λࢦఆ
openConnneciton
ͨ͠Γ
InputStream
ΛѻͬͨΓ
Slide 13
Slide 13 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
URL
Λࢦఆ
openConnneciton
ͨ͠Γ
Ϩεϙϯε݁ՌΛࢦ
ఆͨ͠ܕʹม͢ΔͨΊ
ͷ࣮ͨ͠Γ
InputStream
ΛѻͬͨΓ
Slide 14
Slide 14 text
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
return withContext(Dispatchers.IO) {
val url = URL("https://api.github.com/users/$user/repos")
val urlConnection = url.openConnection() as HttpURLConnection
val result: List
try {
val inputStream = BufferedInputStream(urlConnection.inputStream)
result = readStream(inputStream)
} finally {
urlConnection.disconnect()
}
return@withContext result
}
}
private fun readStream(inputStream: BufferedInputStream) =
inputStream.bufferedReader().use {
convert(it)
}
private fun convert(reader: BufferedReader): List {
val content = StringBuilder()
reader.use {
var line = it.readLine()
while (line != null) {
content.append(line)
line = it.readLine()
}
}
return Json { strictMode = false }
.parse(Repo.serializer().list, content.toString())
}
}
URL
Λࢦఆ
openConnneciton
ͨ͠Γ
Ϩεϙϯε݁ՌΛࢦ
ఆͨ͠ܕʹม͢ΔͨΊ
ͷ࣮ͨ͠Γ
connectionΛ
அͨ͠Γ
InputStream
ΛѻͬͨΓ
Slide 15
Slide 15 text
https://square.github.io/retrofit/
Slide 16
Slide 16 text
গ͠ͷઃఆͱ͍͏ͷ
interface GitHubServiceWithoutRetrofit {
suspend fun listRepos(user: String): List
}
Slide 17
Slide 17 text
গ͠ͷઃఆͱ͍͏ͷ
interface GitHubServiceWithoutRetrofit {
suspend fun listRepos(user: String): List
}
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
Slide 18
Slide 18 text
গ͠ͷઃఆͱ͍͏ͷ
interface GitHubServiceWithoutRetrofit {
suspend fun listRepos(user: String): List
}
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
Slide 19
Slide 19 text
গ͠ͷઃఆͱ͍͏ͷ
interface GitHubServiceWithoutRetrofit {
suspend fun listRepos(user: String): List
}
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
Slide 20
Slide 20 text
গ͠ͷઃఆͱ͍͏ͷ
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
…
}
}
Slide 21
Slide 21 text
গ͠ͷઃఆͱ͍͏ͷ
class GitHubServiceImpl : GitHubServiceWithoutRetrofit {
override suspend fun listRepos(user: String): List {
…
}
}
val gitHubServiceWithRetrofit: GitHubServiceWithRetrofit =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.build()
.create(GitHubServiceWithRetrofit::class.java)
Slide 22
Slide 22 text
ඞཁͳͷ͜Ε͚ͩ
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
val gitHubServiceWithRetrofit: GitHubServiceWithRetrofit =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubServiceWithRetrofit::class.java)
Slide 23
Slide 23 text
ඞཁͳͷ͜Ε͚ͩ
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
val gitHubServiceWithRetrofit: GitHubServiceWithRetrofit =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubServiceWithRetrofit::class.java)
Slide 24
Slide 24 text
https://speakerdeck.com/yasi/how-retrofit2-works-try-making-your-own-
converter
Slide 25
Slide 25 text
ඞཁͳͷ͜Ε͚ͩ
interface GitHubServiceWithRetrofit {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
val gitHubServiceWithRetrofit: GitHubServiceWithRetrofit =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubServiceWithRetrofit::class.java)
Slide 26
Slide 26 text
RetrofitͷΈ
Slide 27
Slide 27 text
interface GitHubService {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
val gitHubService: GitHubService =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubService::class.java)
Slide 28
Slide 28 text
interface GitHubService {
@GET("users/{user}/repos")
fun listRepos(@Path("user") user: String): Call>
}
val gitHubService: GitHubService =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubService::class.java)
Slide 29
Slide 29 text
retrofit.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 30
Slide 30 text
retrofit.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 31
Slide 31 text
retrofit.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 32
Slide 32 text
retrofit.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 33
Slide 33 text
Proxy.newProxyInstanceͷྫ
interface Service {
fun doSomething(value: Int)
}
Slide 34
Slide 34 text
Proxy.newProxyInstanceͷྫ
interface Service {
fun doSomething(value: Int)
}
fun create(service: Class): T {
return Proxy.newProxyInstance(
service.classLoader,
Array(1) { service },
InvocationHandler { proxy, method, args ->
Log.d(TAG, "start")
Log.d(TAG, method.name +
if (args.isNotEmpty()) args[0] else "")
Log.d(TAG, "end")
}
) as T
}
Slide 35
Slide 35 text
Proxy.newProxyInstanceͷྫ
interface Service {
fun doSomething(value: Int)
}
fun create(service: Class): T {
return Proxy.newProxyInstance(
service.classLoader,
Array(1) { service },
InvocationHandler { proxy, method, args ->
Log.d(TAG, "start")
Log.d(TAG, method.name +
if (args.isNotEmpty()) args[0] else "")
Log.d(TAG, "end")
}
) as T
}
val service = create(Service::class.java)
service.doSomething(1000)
Slide 36
Slide 36 text
Proxy.newProxyInstanceͷྫ
interface Service {
fun doSomething(value: Int)
}
fun create(service: Class): T {
return Proxy.newProxyInstance(
service.classLoader,
Array(1) { service },
InvocationHandler { proxy, method, args ->
Log.d(TAG, "start")
Log.d(TAG, method.name +
if (args.isNotEmpty()) args[0] else "")
Log.d(TAG, "end")
}
) as T
}
val service = create(Service::class.java)
service.doSomething(1000)
ϩάग़ྗ
start
doSomething1000
end
Slide 37
Slide 37 text
Proxy.newProxyInstanceͷྫ
interface Service {
fun doSomething(value: Int)
}
fun create(service: Class): T {
return Proxy.newProxyInstance(
service.classLoader,
Array(1) { service },
InvocationHandler { proxy, method, args ->
Log.d(TAG, "start")
Log.d(TAG, method.name +
if (args.isNotEmpty()) args[0] else "")
Log.d(TAG, "end")
}
) as T
}
val service = create(Service::class.java)
service.doSomething(1000)
ϩάग़ྗ
start
doSomething1000
end
Slide 38
Slide 38 text
val gitHubService: GitHubService =
Retrofit.Builder()
ɹɹɹɹɹ// লུ
.create(GitHubService::class.java)
Slide 39
Slide 39 text
gitHubService.listRepos("kwmt")
val gitHubService: GitHubService =
Retrofit.Builder()
ɹɹɹɹɹ// লུ
.create(GitHubService::class.java)
Slide 40
Slide 40 text
gitHubService.listRepos("kwmt")
val gitHubService: GitHubService =
Retrofit.Builder()
ɹɹɹɹɹ// লུ
.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 41
Slide 41 text
gitHubService.listRepos("kwmt")
val gitHubService: GitHubService =
Retrofit.Builder()
ɹɹɹɹɹ// লུ
.create(GitHubService::class.java)
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 42
Slide 42 text
Retrofit#loadServiceMethod
ServiceMethod loadServiceMethod(Method method) {
ServiceMethod result = serviceMethodCache.get(method);
if (result != null) return result;
synchronized (serviceMethodCache) {
result = serviceMethodCache.get(method);
if (result == null) {
result = ServiceMethod.parseAnnotations(this, method);
serviceMethodCache.put(method, result);
}
}
return result;
}
Slide 43
Slide 43 text
ServiceMethod#parseAnnotations
• ఆٛͨ͠ΠϯλʔϑΣΠεΛϦϑϨΫγϣϯͰղ͠
ͯΞϊςʔγϣϯΓͷܕΛௐɺHTTPϦΫΤε
τͰ͖Δ͔νΣοΫ͍ͯ͠·͢ɻʢͨͱ͑ɺPOSTͳ
ͷʹbody͕ͳ͍ͱ͔ͩͱΤϥʔʹͳΓ·͢ɻʣ
• ઃఆͨ͠CallAdapterConverterΛHTTPϦΫΤετͰ
͑ΔΑ͏ʹ͠·͢ɻ
Slide 44
Slide 44 text
CallAdapterͷΈ
Slide 45
Slide 45 text
CallAdapterͱ
• ϨεϙϯεͷRܕΛ࣋ͭ CallΛTܕʹదԠ(adapt)ͤ͞Δ
ΠϯλʔϑΣΠε
• ΠϯελϯεCallAdapter.FactoryʹΑͬͯੜ͞Ε
ΔɻaddCallAdapterFactoryΛͬͯRetrofitΠϯελϯ
εʹՃ͠·͢ɻ
https://square.github.io/retrofit/2.x/retrofit/retrofit2/
CallAdapter.html
Slide 46
Slide 46 text
ϨεϙϯεͷRܕΛ࣋ͭ CallΛTܕʹదԠ(adapt)ͤ͞
ΔΠϯλʔϑΣΠε
Slide 47
Slide 47 text
ϨεϙϯεͷRܕΛ࣋ͭ CallΛTܕʹదԠ(adapt)ͤ͞
ΔΠϯλʔϑΣΠε
Slide 48
Slide 48 text
ΠϯελϯεCallAdapter.FactoryʹΑͬͯੜ
Slide 49
Slide 49 text
Factory#getɺCallAdapter#adapt
͕ͲͷΑ͏ʹݺΕ͍ͯΔ͔ʁ
ServiceMethod loadServiceMethod(Method method) {
ServiceMethod result = serviceMethodCache.get(method);
if (result != null) return result;
synchronized (serviceMethodCache) {
result = serviceMethodCache.get(method);
if (result == null) {
result = ServiceMethod.parseAnnotations(this, method);
serviceMethodCache.put(method, result);
}
}
return result;
}
Slide 50
Slide 50 text
ServiceMethod#parseAnnotations
Slide 51
Slide 51 text
ServiceMethod#parseAnnotations
Slide 52
Slide 52 text
ServiceMethod#parseAnnotations
Slide 53
Slide 53 text
ServiceMethod#parseAnnotations
Slide 54
Slide 54 text
ServiceMethod#parseAnnotations
val gitHubService: GitHubService =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubService::class.java)
Slide 55
Slide 55 text
ServiceMethod#parseAnnotations
val gitHubService: GitHubService =
Retrofit.Builder()
.baseUrl("https://api.github.com/")
.addConverterFactory(MyConverterFactory())
.addCallAdapterFactory(MyCallAdapterFactory())
.build()
.create(GitHubService::class.java)
Slide 56
Slide 56 text
ServiceMethod#parseAnnotations
// CallAdapter.Factoryऔಘ
callAdapterFactories.get(i)
// CallAdapterΛऔಘ
.get();
Slide 57
Slide 57 text
ServiceMethod#parseAnnotations
// CallAdapter.Factoryऔಘ
callAdapterFactories.get(i)
// CallAdapterΛऔಘ
.get();
Slide 58
Slide 58 text
ServiceMethod#parseAnnotations
// CallAdapter.Factoryऔಘ
callAdapterFactories.get(i)
// CallAdapterΛऔಘ
.get();
Slide 59
Slide 59 text
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 60
Slide 60 text
public T create(final Class service) {
ɹ// লུ
return (T) Proxy.newProxyInstance(
service.getClassLoader(),
new Class[] { service },
new InvocationHandler() {
@Override public @Nullable
Object invoke(Object proxy,
Method method,
@Nullable Object[] args) throws Throwable {
ɹɹɹɹɹ // লུ
return loadServiceMethod(method)
.invoke(args != null ? args : emptyArgs);
}
});
}
Slide 61
Slide 61 text
ServiceMethod#invoke
@Override invoke() {
// লུ
return adapt(call, args);
}
@Override adapt(): T {
return callAdapter.adapt(call);
}
Slide 62
Slide 62 text
ServiceMethod#invoke
@Override invoke() {
// লུ
return adapt(call, args);
}
@Override adapt(): T {
return callAdapter.adapt(call);
}
Slide 63
Slide 63 text
ServiceMethod#invoke
@Override invoke() {
// লུ
return adapt(call, args);
}
@Override adapt(): T {
return callAdapter.adapt(call);
}
Slide 64
Slide 64 text
CallAdapterͷ͍ํ(࣮ͷํ)
Slide 65
Slide 65 text
CallAdapter.Factory
class MyCallAdapterFactory : CallAdapter.Factory() {
override fun get(
returnType: Type,
annotations: Array,
retrofit: Retrofit
): CallAdapter<*, *>? {
val responseType =
getParameterUpperBound(0, returnType as ParameterizedType)
return MyCallAdapter(responseType)
}
}
Slide 66
Slide 66 text
CallAdapter.Factory
class MyCallAdapterFactory : CallAdapter.Factory() {
override fun get(
returnType: Type,
annotations: Array,
retrofit: Retrofit
): CallAdapter<*, *>? {
val responseType =
getParameterUpperBound(0, returnType as ParameterizedType)
return MyCallAdapter(responseType)
}
}
Slide 67
Slide 67 text
CallAdapter.Factory
class MyCallAdapterFactory : CallAdapter.Factory() {
override fun get(
returnType: Type,
annotations: Array,
retrofit: Retrofit
): CallAdapter<*, *>? {
val responseType =
getParameterUpperBound(0, returnType as ParameterizedType)
return MyCallAdapter(responseType)
}
}
Slide 68
Slide 68 text
CallAdapter
Call → T
Slide 69
Slide 69 text
CallAdapter
Call → T =
interface MyCall {
fun execute(): Response
}
Slide 70
Slide 70 text
CallAdapter
Call → T =
interface MyCall {
fun execute(): Response
}
class MyCallAdapter(
private val responseType: Type
) : CallAdapter> {
override fun responseType(): Type = responseType
override fun adapt(call: Call): MyCall {
return object : MyCall {
override fun execute(): Response {
return call.execute()
}
}
}
}
Slide 71
Slide 71 text
CallAdapter
Call → T =
interface MyCall {
fun execute(): Response
}
class MyCallAdapter(
private val responseType: Type
) : CallAdapter> {
override fun responseType(): Type = responseType
override fun adapt(call: Call): MyCall {
return object : MyCall {
override fun execute(): Response {
return call.execute()
}
}
}
}
Slide 72
Slide 72 text
CallAdapter
Call → T =
interface MyCall {
fun execute(): Response
}
class MyCallAdapter(
private val responseType: Type
) : CallAdapter> {
override fun responseType(): Type = responseType
override fun adapt(call: Call): MyCall {
return object : MyCall {
override fun execute(): Response {
return call.execute()
}
}
}
}
Slide 73
Slide 73 text
CallAdapter
Call → T =
interface MyCall {
fun execute(): Response
}
class MyCallAdapter(
private val responseType: Type
) : CallAdapter> {
override fun responseType(): Type = responseType
override fun adapt(call: Call): MyCall {
return object : MyCall {
override fun execute(): Response {
return call.execute()
}
}
}
}
Slide 74
Slide 74 text
CallAdapterͰΤϥʔϋϯυϦϯά
class MyCallAdapter(
private val responseType: Type
) : CallAdapter> {
override fun responseType(): Type = responseType
override fun adapt(call: Call): MyCall {
return object : MyCall {
override fun execute(): Response {
val response = call.execute()
val code = response.code()
// 401ͳΒϩάΠϯࣦഊ
if(code == 401) {
throw AuthException()
}
return response
}
}
}
}
Slide 75
Slide 75 text
• RetrofitɺΠϯλʔϑΣΠεʹΞϊςʔγϣϯΛ͚ͭͨΓɺ
RetrofitBuilderͰઃఆ͢Δ͚ͩͰɺHTTPϦΫΤετͰ͖Δ
• RetrofitProxy#newProxyInstanceΛ͍ͬͯͯɺιʔεࣗಈ
ੜ͍ͯ͠ΔΘ͚Ͱͳ͍
• CallAdapter.Factory#getCallAdapterΛฦ͚ͩ͢
• CallAdapteradaptϝιουͰCall͔ΒಠࣗͷܕʹมͰ
͖Δ
• CallAdapterͰΤϥʔϋϯυϦϯάՄೳ
·ͱΊ
Slide 76
Slide 76 text
https://github.com/kwmt/RetrofitSample
֬ೝͨ͠ϦϙδτϦ
Slide 77
Slide 77 text
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
@kwmt27