{"id":120,"date":"2024-03-22T08:32:43","date_gmt":"2024-03-22T08:32:43","guid":{"rendered":"http:\/\/localhost\/w643\/?p=120"},"modified":"2024-03-25T07:39:06","modified_gmt":"2024-03-25T07:39:06","slug":"bai-5-service-container-phan-4","status":"publish","type":"post","link":"https:\/\/blog.hnk90.com\/?p=120","title":{"rendered":"B\u00e0i 5. Service Container \u2013 Ph\u1ea7n 4 – K\u1ebft th\u00fac"},"content":{"rendered":"\n

I. Zero Configuration Resolution
II. Binding<\/p>\n\n\n\n

    \n
  1. Basic Binding
    1.1 Simple Binding
    1.2 Binding a Singleton
    1.3 Binding Scoped Singletons
    1.4 Binding Instances<\/li>\n\n\n\n
  2. Binding Interfaces to Implementations<\/li>\n\n\n\n
  3. Contextual Binding<\/li>\n\n\n\n
  4. Binding Primitives<\/li>\n\n\n\n
  5. Binding Typed Variadics
    5.1 Variadic Tag Dependencies<\/li>\n\n\n\n
  6. Tagging<\/li>\n\n\n\n
  7. Extending Bindings<\/li>\n<\/ol>\n\n\n\n

    III. Resolving<\/p>\n\n\n\n

    \n\n\n\n

    Ch\u00fang ta \u0111\u00e3 \u0111i qua Basic Binding, m\u1ed9t ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u01b0ng c\u1ef1c k\u1ef3 quan tr\u1ecdng. Gi\u1edd ch\u00fang a s\u1ebd t\u00ecm hi\u1ec3u ti\u1ebfp c\u00e1c Binding c\u00f2n l\u1ea1i nh\u00e9. H\u01a1i d\u00e0i, ch\u1ecbu h\u00f3 \u0111\u1ecdc t\u1eeb t\u1eeb nh\u00e9 c\u00e1c b\u1ee3n =))<\/p>\n\n\n\n

    2. Binding Interfaces to Implementations<\/strong><\/p>\n\n\n\n

    G\u1ec9a s\u1eed b\u1ea1n c\u00f3 m\u1ed9t interface, g\u1ecdi l\u00e0 EventPusher. V\u00e0 b\u1ea1n c\u00f3 m\u1ed9t implementation (t\u1ee9c l\u00e0 m\u1ed9t class implement interface kia), g\u1ecdi l\u00e0 RedisEventPusher
    B\u00e2y gi\u1edd n\u1ebfu c\u00e1c b\u1ea1n mu\u1ed1n inject interface EventPusher v\u00e0o m\u1ed9t class n\u00e0o \u0111\u00f3, d\u0129 nhi\u00ean c\u00e1c b\u1ea1n ph\u1ea3i bind interface n\u00e0y v\u00e0o Container. V\u00e0 \u1edf \u0111\u00e2y, khi bind v\u00e0o Container c\u00e1c b\u1ea1n s\u1ebd ch\u1ec9 ra class \u0111\u00e3 implement n\u00f3<\/p>\n\n\n\n

    C\u00e1ch d\u00f9ng: <\/p>\n\n\n\n

    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Contracts<\/span>\\<\/span>EventPusher<\/span>;<\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>RedisEventPusher<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>bind<\/span>(<\/span>EventPusher<\/span>::<\/span>class<\/span>,<\/span> <\/span>RedisEventPusher<\/span>::<\/span>class<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    3. Contextual Binding<\/strong><\/p>\n\n\n\n
    Sau khi \u0111\u1ecdc v\u1ec1 binding interfaces \u1edf tr\u00ean, ch\u1eafc b\u1ea1n s\u1ebd th\u1eafc m\u1eafc: N\u1ebfu c\u00f3 nhi\u1ec1u implementation th\u00ec sao ? V\u00e2ng, Contextual Binding gi\u00fap ta gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y<\/p>\n\n\n\n
    Xem v\u00ed d\u1ee5 d\u01b0\u1edbi \u0111\u00e2y<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Http<\/span>\\<\/span>Controllers<\/span>\\<\/span>PhotoController<\/span>;<\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Http<\/span>\\<\/span>Controllers<\/span>\\<\/span>UploadController<\/span>;<\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Http<\/span>\\<\/span>Controllers<\/span>\\<\/span>VideoController<\/span>;<\/span><\/span>\nuse<\/span> <\/span>Illuminate<\/span>\\<\/span>Contracts<\/span>\\<\/span>Filesystem<\/span>\\<\/span>Filesystem<\/span>;<\/span><\/span>\nuse<\/span> <\/span>Illuminate<\/span>\\<\/span>Support<\/span>\\<\/span>Facades<\/span>\\<\/span>Storage<\/span>;<\/span><\/span>\n<\/span>\n\/\/ Filesystem l\u00e0 m\u1ed9t interface<\/span><\/span>\n\/\/ Storage::disk('local'), Storage::disk('s3') hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 2 implementions<\/span><\/span>\n<\/span>\n\/\/ \u0110\u1ed1i v\u1edbi controller PhotoController th\u00ec bind implementaion Storage::disk('local')<\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>(<\/span>PhotoController<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>needs<\/span>(<\/span>Filesystem<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>give<\/span>(<\/span>function<\/span> <\/span>()<\/span> <\/span>{<\/span><\/span>\n              <\/span>return<\/span> <\/span>Storage<\/span>::<\/span>disk<\/span>(<\/span>'<\/span>local<\/span>'<\/span>)<\/span>;<\/span><\/span>\n          <\/span>}<\/span>)<\/span>;<\/span><\/span>\n\/\/ \u0110\u1ed1i v\u1edbi 2 controllers VideoController, UploadController th\u00ec bind implementation Storage::disk('s3')<\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>([<\/span>VideoController<\/span>::<\/span>class<\/span>,<\/span> <\/span>UploadController<\/span>::<\/span>class<\/span>])<\/span><\/span>\n          <\/span>-><\/span>needs<\/span>(<\/span>Filesystem<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>give<\/span>(<\/span>function<\/span> <\/span>()<\/span> <\/span>{<\/span><\/span>\n              <\/span>return<\/span> <\/span>Storage<\/span>::<\/span>disk<\/span>(<\/span>'<\/span>s3<\/span>'<\/span>)<\/span>;<\/span><\/span>\n          <\/span>}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    4. Binding Primitives<\/strong><\/p>\n\n\n\n
    Primitives (D\u1ecbch ra l\u00e0 nguy\u00ean th\u1ee7y) \ud83d\ude42 Hi\u1ec3u \u0111\u01a1n gi\u1ea3n, c\u00e1c b\u1ea1n mu\u1ed1n kh\u1edfi t\u1ea1o m\u1ed9t gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh cho m\u1ed9t variable trong m\u1ed9t class, c\u00e1c  b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m nh\u01b0 sau<\/p>\n\n\n\n
    \u0111\u00e2y l\u00e0 class v\u00ed d\u1ee5<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    class<\/span> <\/span>UserController<\/span><\/span>\n{<\/span><\/span>\n    <\/span>protected<\/span> $variableName<\/span>;<\/span><\/span>\n    <\/span><\/span>\n    <\/span>__construct<\/span>(<\/span>$variableName<\/span>)<\/span> <\/span>{}<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Gi\u1edd mu\u1ed1n kh\u1edfi t\u1ea1o gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh th\u00ec l\u00e0m nh\u01b0 sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Http<\/span>\\<\/span>Controllers<\/span>\\<\/span>UserController<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>(<\/span>UserController<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>needs<\/span>(<\/span>'<\/span>$variableName<\/span>'<\/span>)<\/span><\/span>\n          <\/span>-><\/span>give<\/span>(<\/span>'<\/span>hello world<\/span>'<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Nh\u01b0 v\u1eady khi classs \u0111c g\u1ecdi t\u1edbi th\u00ec gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh c\u1ee7a $variableName s\u1ebd l\u00e0 “hello world”<\/p>\n\n\n\n
    Th\u1ef1c ra Primitives c\u0169ng thu\u1ed9c v\u1ec1 kh\u00e1i ni\u1ec7m Contextual. Binding Contextual hi\u1ec3u r\u1ed9ng ra th\u00ec n\u00f3 kh\u00f4ng ch\u1ec9 gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n interface c\u00f3 nhi\u1ec1u implemetation, m\u00e0 n\u00f3 c\u00f2n gi\u00fap define gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh c\u1ee7a c\u00e1c variables. <\/p>\n\n\n\n
    Kh\u00f4ng nh\u1eefng th\u1ebf, Contextual c\u00f2n gi\u00fap x\u1eed l\u00fd c\u00e1c d\u1ea1ng dependences c\u00f3 d\u1ea1ng Array, nh\u01b0 \u1edf ph\u1ea7n 5 d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n
    5. Binding Typed Variadics<\/strong><\/p>\n\n\n\n
    Xem class d\u01b0\u1edbi \u0111\u00e2y<\/p>\n\n\n\n
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    <?<\/span>php<\/span><\/span>\n <\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Models<\/span>\\<\/span>Filter<\/span>;<\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>Logger<\/span>;<\/span><\/span>\n <\/span><\/span>\nclass<\/span> <\/span>Firewall<\/span><\/span>\n{<\/span><\/span>\n    <\/span>\/**<\/span><\/span>\n     * The filter instances.<\/span><\/span>\n     *<\/span><\/span>\n     * <\/span>@<\/span>var<\/span> <\/span>array<\/span><\/span>\n     *\/<\/span><\/span>\n    <\/span>protected<\/span> $filters<\/span>;<\/span><\/span>\n <\/span><\/span>\n    <\/span>\/**<\/span><\/span>\n     * Create a new class instance.<\/span><\/span>\n     *\/<\/span><\/span>\n    <\/span>public<\/span> <\/span>function<\/span> <\/span>__construct<\/span>(<\/span><\/span>\n        <\/span>protected<\/span> <\/span>Logger<\/span> <\/span>$logger<\/span>,<\/span><\/span>\n        <\/span>Filter<\/span> <\/span>...<\/span>$filters<\/span>,<\/span><\/span>\n    <\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>$this<\/span>-><\/span>filters<\/span> <\/span>=<\/span> <\/span>$filters<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    class Firewall c\u00f3 inject m\u1ed9t m\u1ea3ng c\u00e1c instance c\u1ee7a Filter. \u0110\u1ec3 c\u00f3 th\u1ec3 inject dependence n\u00e0y v\u00e0o th\u00ec l\u00e0m nh\u01b0 sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    $this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>(<\/span>Firewall<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>needs<\/span>(<\/span>Filter<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>give<\/span>(<\/span>function<\/span> <\/span>(<\/span>Application<\/span> <\/span>$app<\/span>)<\/span> <\/span>{<\/span><\/span>\n                <\/span>return<\/span> [<\/span><\/span>\n                    <\/span>$app<\/span>-><\/span>make<\/span>(<\/span>NullFilter<\/span>::<\/span>class<\/span>)<\/span>,<\/span><\/span>\n                    <\/span>$app<\/span>-><\/span>make<\/span>(<\/span>ProfanityFilter<\/span>::<\/span>class<\/span>)<\/span>,<\/span><\/span>\n                    <\/span>$app<\/span>-><\/span>make<\/span>(<\/span>TooLongFilter<\/span>::<\/span>class<\/span>)<\/span>,<\/span><\/span>\n                ]<\/span>;<\/span><\/span>\n          <\/span>}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    Ho\u1eb7c \u0111\u1ec3 cho ng\u1eafn g\u1ecdn th\u00ec vi\u1ebft nh\u01b0 sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    $this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>(<\/span>Firewall<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>needs<\/span>(<\/span>Filter<\/span>::<\/span>class<\/span>)<\/span><\/span>\n          <\/span>-><\/span>give<\/span>([<\/span><\/span>\n              <\/span>NullFilter<\/span>::<\/span>class<\/span>,<\/span><\/span>\n              <\/span>ProfanityFilter<\/span>::<\/span>class<\/span>,<\/span><\/span>\n              <\/span>TooLongFilter<\/span>::<\/span>class<\/span>,<\/span><\/span>\n          ])<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    Ph\u1ea7n 5.1 Variadic Tag Dependencies m\u00ecnh s\u1ebd n\u00f3i sau, khi \u0111\u00e3 \u0111i qua ph\u1ea7n 6. Tagging<\/p>\n\n\n\n
    6. Tagging<\/strong><\/p>\n\n\n\n
    G\u1ec9a s\u1eed c\u00e1c b\u1ea1n c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i reports (CpuReport, MemoryReport, …). C\u00e1c report n\u00e0y l\u00e0 implementations c\u1ee7a report interface. Gi\u1edd ch\u00fang ta nh\u00f3m c\u00e1 reports n\u00e0y l\u1ea1i sau khi \u0111\u00e3 binding<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    $this<\/span>-><\/span>app<\/span>-><\/span>bind<\/span>(<\/span>CpuReport<\/span>::<\/span>class<\/span>,<\/span> <\/span>function<\/span> <\/span>()<\/span> <\/span>{<\/span><\/span>\n    <\/span>\/\/ ...<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>bind<\/span>(<\/span>MemoryReport<\/span>::<\/span>class<\/span>,<\/span> <\/span>function<\/span> <\/span>()<\/span> <\/span>{<\/span><\/span>\n    <\/span>\/\/ ...<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>tag<\/span>([<\/span>CpuReport<\/span>::<\/span>class<\/span>,<\/span> <\/span>MemoryReport<\/span>::<\/span>class<\/span>]<\/span>,<\/span> <\/span>'<\/span>reports<\/span>'<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Gi\u1edd mu\u1ed1n l\u1ea5y c\u00e1c dependences n\u00e0y th\u00ec \u0111\u01a1n gi\u1ea3n l\u00e0 g\u1ecdi $app->tagged(‘reports’)<\/p>\n\n\n\n
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    $this<\/span>-><\/span>app<\/span>-><\/span>bind<\/span>(<\/span>ReportAnalyzer<\/span>::<\/span>class<\/span>,<\/span> <\/span>function<\/span> <\/span>(<\/span>Application<\/span> <\/span>$app<\/span>)<\/span> <\/span>{<\/span><\/span>\n    <\/span>return<\/span> <\/span>new<\/span> <\/span>ReportAnalyzer<\/span>(<\/span>$app<\/span>-><\/span>tagged<\/span>(<\/span>'<\/span>reports<\/span>'<\/span>))<\/span>;<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Quay tr\u1edf l\u1ea1i ph\u1ea7n 5.1, gi\u1ea3 s\u1eed class c\u1ee7a ch\u00fang ta c\u00f3 th\u1ec3m Reports …$reports (t\u1ee9c l\u00e0 m\u1ed9t m\u1ea3ng c\u00e1c report). Ch\u00fang ta l\u00e0m nh\u01b0 sau \u0111\u1ec3 inject ch\u00fang v\u00e0o<\/p>\n\n\n\n
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    $this<\/span>-><\/span>app<\/span>-><\/span>when<\/span>(<\/span>ReportAggregator<\/span>::<\/span>class<\/span>)<\/span><\/span>\n    <\/span>-><\/span>needs<\/span>(<\/span>Report<\/span>::<\/span>class<\/span>)<\/span><\/span>\n    <\/span>-><\/span>giveTagged<\/span>(<\/span>'<\/span>reports<\/span>'<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    7. Extending Bindings<\/strong><\/p>\n\n\n\n
    Tham kh\u1ea3o v\u00ed d\u1ee5: https:\/\/viblo.asia\/p\/tap-6-service-container-laravel-RQqKL2drl7z<\/p>\n\n\n\n
    G\u1ec9a s\u1eed b\u1ea1n c\u00f3 m\u1ed9t Service \u0111\u00e3 \u0111\u01b0\u1ee3c resolved. V\u00ed d\u1ee5 nh\u01b0: app\/User.php<\/p>\n\n\n\n
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    public<\/span> <\/span>function<\/span> <\/span>test<\/span>()<\/span><\/span>\n{<\/span><\/span>\n    <\/span>return<\/span> <\/span>"<\/span>test() method of User class<\/span>"<\/span>;<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    N\u1ebfu mu\u1ed1n override l\u1ea1i function test, ch\u00fang ta t\u1ea1o th\u00eam m\u1ed9t class app\/DecoratedUser.php<\/p>\n\n\n\n
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    protected<\/span> <\/span>$user<\/span>;<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>function<\/span> <\/span>__construct<\/span>(<\/span>User<\/span> <\/span>$user<\/span>)<\/span><\/span>\n{<\/span><\/span>\n    <\/span>$this<\/span>-><\/span>user<\/span> <\/span>=<\/span> <\/span>$user<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>function<\/span> <\/span>decoratedTest<\/span>()<\/span><\/span>\n{<\/span><\/span>\n    <\/span>return<\/span> <\/span>'<\/span>Decorated: <\/span>'<\/span> <\/span>.<\/span> <\/span>$this<\/span>-><\/span>user<\/span>-><\/span>test<\/span>()<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Sau \u0111\u00f3 th\u00ec extend n\u00f3 nh\u01b0 sau: <\/p>\n\n\n\n
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    \/\/ Bi\u1ebfn $user trong closure function d\u00f9ng l\u00e0 th\u1ec3 hi\u1ec7n cho class App\\User<\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>extend<\/span>(<\/span>'<\/span>App<\/span>\\U<\/span>ser<\/span>'<\/span>,<\/span> <\/span>function<\/span>(<\/span>$user<\/span>)<\/span> <\/span>{<\/span><\/span>\n    <\/span>return<\/span> <\/span>new<\/span> \\<\/span>App<\/span>\\<\/span>DecoratedUser<\/span>(<\/span>$user<\/span>)<\/span>;<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Khi resolve nh\u01b0 sau<\/p>\n\n\n\n
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    Route<\/span>:<\/span>:<\/span>get<\/span>(<\/span>'<\/span>\/<\/span>'<\/span>,<\/span> <\/span>function<\/span>()<\/span> <\/span>{<\/span><\/span>\n    <\/span>return<\/span> <\/span>app<\/span>()<\/span>-><\/span>make<\/span>(<\/span>'<\/span>App<\/span>\\U<\/span>ser<\/span>'<\/span>)<\/span>-><\/span>decoratedTest<\/span>()<\/span>;<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    C\u00e1c b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y, m\u1eb7c d\u00f9 \u0111ang resolve App\\User nh\u01b0ng ch\u00fang ta c\u00f3 th\u1ec3 g\u1ecdi t\u1edbi function decoratedTest c\u1ee7a app\/DecoratedUser.php, \u0111\u00f3 l\u00e0 do ch\u00fang ta \u0111\u00e3 binding extending \u1edf ph\u00eda tr\u00ean. <\/p>\n\n\n\n
    Cu\u1ed1i c\u00f9ng c\u0169ng t\u1edbi ph\u1ea7n cu\u1ed1i<\/p>\n\n\n\n
    III. Resolving<\/strong><\/p>\n\n\n\n
    \u0110\u1ec3 resolve m\u1ed9t class t\u1eeb Container th\u00ec l\u00e0m nh\u01b0 sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>Transistor<\/span>;<\/span><\/span>\n<\/span>\n\/\/ D\u00f9ng $this->app->make<\/span><\/span>\n$transistor<\/span> <\/span>=<\/span> <\/span>$this<\/span>-><\/span>app<\/span>-><\/span>make<\/span>(<\/span>Transistor<\/span>::<\/span>class<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Ho\u1eb7c<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>Transistor<\/span>;<\/span><\/span>\nuse<\/span> <\/span>Illuminate<\/span>\\<\/span>Support<\/span>\\<\/span>Facades<\/span>\\<\/span>App<\/span>;<\/span><\/span>\n<\/span>\n\/\/ S\u1eed d\u1ee5ng App facade<\/span><\/span>\n$transistor<\/span> <\/span>=<\/span> App<\/span>:<\/span>:<\/span>make<\/span>(<\/span>Transistor<\/span>::<\/span>class<\/span>)<\/span>;<\/span><\/span>\n\/\/ Ho\u1eb7c s\u1eed d\u1ee5ng app() helper<\/span><\/span>\n$transistor<\/span> <\/span>=<\/span> <\/span>app<\/span>(<\/span>Transistor<\/span>::<\/span>class<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Khi mu\u1ed1n resolve class c\u00f9ng v\u1edbi tham s\u1ed1 m\u1eb7c \u0111\u1ecbnh <\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>Transistor<\/span>;<\/span><\/span>\n <\/span><\/span>\n$transistor<\/span> <\/span>=<\/span> <\/span>$this<\/span>-><\/span>app<\/span>-><\/span>makeWith<\/span>(<\/span>Transistor<\/span>::<\/span>class<\/span>,<\/span> [<\/span>'<\/span>id<\/span>'<\/span> <\/span>=><\/span> <\/span>1<\/span>])<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Trong “controller”, “middleware”, “event listener”… Laravel cung c\u1ea5p c\u01a1 ch\u1ebf t\u1ef1 \u0111\u1ed9ng resolve 
    (g\u1ecdi l\u00e0 Automatic Injection)<\/p>\n\n\n\n
    Xem v\u00ed d\u1ee5<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    <?<\/span>php<\/span><\/span>\n <\/span><\/span>\nnamespace<\/span> <\/span>App<\/span>\\<\/span>Http<\/span>\\<\/span>Controllers<\/span>;<\/span><\/span>\n <\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Repositories<\/span>\\<\/span>UserRepository<\/span>;<\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Models<\/span>\\<\/span>User<\/span>;<\/span><\/span>\n <\/span><\/span>\nclass<\/span> <\/span>UserController<\/span> <\/span>extends<\/span> <\/span>Controller<\/span><\/span>\n{<\/span><\/span>\n    <\/span>\/**<\/span><\/span>\n     * Create a new controller instance.<\/span><\/span>\n     *\/<\/span><\/span>\n    <\/span>public<\/span> <\/span>function<\/span> <\/span>__construct<\/span>(<\/span><\/span>\n        <\/span>protected<\/span> <\/span>UserRepository<\/span> <\/span>$users<\/span>,<\/span><\/span>\n    <\/span>)<\/span> <\/span>{}<\/span><\/span>\n <\/span><\/span>\n    <\/span>\/**<\/span><\/span>\n     * Show the user with the given ID.<\/span><\/span>\n     *\/<\/span><\/span>\n    <\/span>public<\/span> <\/span>function<\/span> <\/span>show<\/span>(<\/span>string<\/span> <\/span>$id<\/span>)<\/span>:<\/span> User<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>$user<\/span> <\/span>=<\/span> <\/span>$this<\/span>-><\/span>users<\/span>-><\/span>findOrFail<\/span>(<\/span>$id<\/span>)<\/span>;<\/span><\/span>\n <\/span><\/span>\n        <\/span>return<\/span> <\/span>$user<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    C\u00e1c b\u1ea1n th\u1ea5y UserRepository s\u1ebd \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng resolve khi c\u00e1c b\u1ea1n khai b\u00e1o v\u00e0o __construct function.<\/p>\n\n\n\n
    V\u00e0 thi tho\u1ea3ng c\u00e1c b\u1ea1n mu\u1ed1n v\u1eeba resolve class, v\u1eeba g\u1ecdi t\u1edbi m\u1ed9t function c\u1ee7a n\u00f3. 
    V\u00ed d\u1ee5 c\u00e1c b\u1ea1n c\u00f3 class sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    <?<\/span>php<\/span><\/span>\n <\/span><\/span>\nnamespace<\/span> <\/span>App<\/span>;<\/span><\/span>\n <\/span><\/span>\nuse<\/span> <\/span>App<\/span>\\<\/span>Repositories<\/span>\\<\/span>UserRepository<\/span>;<\/span><\/span>\n <\/span><\/span>\nclass<\/span> <\/span>UserReport<\/span><\/span>\n{<\/span><\/span>\n    <\/span>\/**<\/span><\/span>\n     * Generate a new user report.<\/span><\/span>\n     *\/<\/span><\/span>\n    <\/span>public<\/span> <\/span>function<\/span> <\/span>generate<\/span>(<\/span>UserRepository<\/span> <\/span>$repository<\/span>)<\/span>:<\/span> array<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>return<\/span> [<\/span><\/span>\n            <\/span>\/\/ ...<\/span><\/span>\n        ]<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    B\u00e2y gi\u1edd v\u1eeba resolve class tr\u00ean v\u1eeba g\u1ecdi t\u1edbi function generate th\u00ec l\u00e0m nh\u01b0 sau <\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>UserReport<\/span>;<\/span><\/span>\nuse<\/span> <\/span>Illuminate<\/span>\\<\/span>Support<\/span>\\<\/span>Facades<\/span>\\<\/span>App<\/span>;<\/span><\/span>\n <\/span><\/span>\n$report<\/span> <\/span>=<\/span> App<\/span>:<\/span>:<\/span>call<\/span>([<\/span>new<\/span> <\/span>UserReport<\/span>,<\/span> <\/span>'<\/span>generate<\/span>'<\/span>])<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Cu\u1ed1i c\u00f9ng, n\u1ebfu b\u1ea1n mu\u1ed1n “g\u1eedi \u0111i m\u1ed9t s\u1ef1 ki\u00ean (event)” khi class \u0111\u01b0\u1ee3c resolve th\u00ec l\u00e0m nh\u01b0 sau<\/p>\n\n\n\n
    <\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
    use<\/span> <\/span>App<\/span>\\<\/span>Services<\/span>\\<\/span>Transistor<\/span>;<\/span><\/span>\nuse<\/span> <\/span>Illuminate<\/span>\\<\/span>Contracts<\/span>\\<\/span>Foundation<\/span>\\<\/span>Application<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>resolving<\/span>(<\/span>Transistor<\/span>::<\/span>class<\/span>,<\/span> <\/span>function<\/span> <\/span>(<\/span>Transistor<\/span> <\/span>$transistor<\/span>,<\/span> <\/span>Application<\/span> <\/span>$app<\/span>)<\/span> <\/span>{<\/span><\/span>\n    <\/span>\/\/ Khi resolve class Transistor th\u00ec x\u1eed l\u00fd \u0111o\u1ea1n code n\u00e0y ...<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span>\n <\/span><\/span>\n$this<\/span>-><\/span>app<\/span>-><\/span>resolving<\/span>(<\/span>function<\/span> <\/span>(<\/span>mixed<\/span> <\/span>$object<\/span>,<\/span> <\/span>Application<\/span> <\/span>$app<\/span>)<\/span> <\/span>{<\/span><\/span>\n    <\/span>\/\/ Khi resolve b\u1ea5t khi b\u1ea5t k\u00ec classes n\u00e0o th\u00ec x\u1eed l\u00fd \u0111o\u1ea1n code n\u00e0y ...<\/span><\/span>\n}<\/span>)<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    <\/p>\n\n\n\n
    Oke! V\u1eady l\u00e0 c\u0169ng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 Serivce Container. Khi \u0111\u1ecdc h\u1ebft 4 ph\u1ea7n, t\u00f4i ngh\u0129 c\u00e1c b\u1ea1n \u0111\u00e3 hi\u1ec3u “l\u1edd m\u1edd” n\u00f3 l\u00e0 c\u00e1i g\u00ec. \u0110\u1ec3 hi\u1ec3u h\u01a1n th\u00ec ch\u00fang ta ph\u1ea3i nghi\u1ec1n ng\u1eabm l\u1ea1i, t\u00ecm hi\u1ec3u th\u00eam, \u0111\u1eb7c bi\u1ec7t l\u00e0 ph\u1ea3i va ch\u1ea1m c\u00e1c b\u00e0i to\u00e1n th\u1ef1c t\u1ebf.
    Anyway, kh\u00f4ng sao c\u1ea3. C\u1ee9 keep in mind l\u00e0 v\u1edbi giai \u0111o\u1ea1n hi\u1ec7n t\u1ea1i, ch\u00fang ta ch\u1ec9 c\u1ea7n hi\u1ec3u l\u00fd thuy\u1ebft \u1edf m\u1ee9c “t\u01b0\u01a1ng \u0111\u1ed1i” nh\u01b0 v\u1eady th\u00f4i. T\u00f4i s\u1ebd c\u00f9ng c\u00e1c b\u1ea1n ti\u1ebfp t\u1ee5c kh\u00e1m ph\u00e1 trong c\u00e1c b\u00e0i ti\u1ebfp theo, m\u1ecdi th\u1ee9 s\u1ebd d\u1ea7n d\u1ea7n \u0111\u01b0\u1ee3c s\u00e1ng t\u1ecf h\u01a1n. <\/p>\n\n\n\n
    Ch\u00fac c\u00e1c b\u1ea1n th\u00e0nh c\u00f4ng v\u00e0 gi\u1eef v\u1eefng \u0111\u1ed9ng l\u1ef1c h\u1ecdc t\u1eadp \ud83d\ude42 <\/p>\n","protected":false},"excerpt":{"rendered":"
    I. Zero Configuration ResolutionII. Binding III. Resolving Ch\u00fang ta \u0111\u00e3 \u0111i qua Basic Binding, m\u1ed9t ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u01b0ng c\u1ef1c k\u1ef3 quan tr\u1ecdng. Gi\u1edd ch\u00fang a s\u1ebd t\u00ecm hi\u1ec3u ti\u1ebfp c\u00e1c Binding c\u00f2n l\u1ea1i nh\u00e9. H\u01a1i d\u00e0i, ch\u1ecbu h\u00f3 \u0111\u1ecdc t\u1eeb t\u1eeb nh\u00e9 c\u00e1c b\u1ee3n =)) 2. Binding Interfaces to Implementations G\u1ec9a s\u1eed b\u1ea1n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-120","post","type-post","status-publish","format-standard","hentry","category-laravel"],"_links":{"self":[{"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/posts\/120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=120"}],"version-history":[{"count":8,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/posts\/120\/revisions"}],"predecessor-version":[{"id":158,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=\/wp\/v2\/posts\/120\/revisions\/158"}],"wp:attachment":[{"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hnk90.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}