{"id":50800,"date":"2024-08-10T16:43:07","date_gmt":"2024-08-10T07:43:07","guid":{"rendered":"https:\/\/m9js.shop\/blog\/development\/a-practical-approach-to-state-patterns-for-managing-complex-state-transitions"},"modified":"2024-08-10T16:43:07","modified_gmt":"2024-08-10T07:43:07","slug":"a-practical-approach-to-state-patterns-for-managing-complex-state-transitions","status":"publish","type":"post","link":"https:\/\/m9js.shop\/blog\/development\/a-practical-approach-to-state-patterns-for-managing-complex-state-transitions","title":{"rendered":"\ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud55c \uc0c1\ud0dc \ud328\ud134\uc758 \uc2e4\uc6a9\uc801 \uc811\uadfc"},"content":{"rendered":"<ul class=\"toc_post_list\">\n<li>\n<h2>\ubaa9\ucc28<\/h2>\n<ul>\n<li><a href=\"#%eb%b3%b5%ec%9e%a1%ed%95%9c-%ec%83%81%ed%83%9c-%ec%a0%84%ed%99%98-%ea%b4%80%eb%a6%ac%eb%a5%bc-%ec%9c%84%ed%95%9c-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%8b%a4%ec%9a%a9%ec%a0%81-%ec%a0%91-zdqbFmUHNv\">\ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud55c \uc0c1\ud0dc \ud328\ud134\uc758 \uc2e4\uc6a9\uc801 \uc811\uadfc<\/a><\/li>\n<li><a href=\"#1-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b0%9c%eb%85%90-zdqbFmUHNv\">1. \uc0c1\ud0dc \ud328\ud134\uc758 \uac1c\ub150<\/a><\/li>\n<li><a href=\"#2-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%9e%a5%ec%a0%90-zdqbFmUHNv\">2. \uc0c1\ud0dc \ud328\ud134\uc758 \uc7a5\uc810<\/a><\/li>\n<li><a href=\"#3-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b5%ac%ed%98%84-%eb%b0%a9%eb%b2%95-zdqbFmUHNv\">3. \uc0c1\ud0dc \ud328\ud134\uc758 \uad6c\ud604 \ubc29\ubc95<\/a><\/li>\n<li><a href=\"#4-%ec%8b%a4%ec%a0%9c-%ec%82%ac%eb%a1%80-%ec%97%b0%ea%b5%ac-%ea%b2%8c%ec%9e%84-%ea%b0%9c%eb%b0%9c%ec%97%90%ec%84%9c%ec%9d%98-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4-zdqbFmUHNv\">4. \uc2e4\uc81c \uc0ac\ub840 \uc5f0\uad6c: \uac8c\uc784 \uac1c\ubc1c\uc5d0\uc11c\uc758 \uc0c1\ud0dc \ud328\ud134<\/a><\/li>\n<li><a href=\"#5-%eb%b3%b5%ec%9e%a1%ed%95%9c-%ec%8b%9c%ec%8a%a4%ed%85%9c%ec%97%90%ec%84%9c%ec%9d%98-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4-%ed%99%9c%ec%9a%a9-zdqbFmUHNv\">5. \ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c\uc758 \uc0c1\ud0dc \ud328\ud134 \ud65c\uc6a9<\/a><\/li>\n<li><a href=\"#6-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ea%b3%bc-%eb%8b%a4%eb%a5%b8-%eb%94%94%ec%9e%90%ec%9d%b8-%ed%8c%a8%ed%84%b4-%eb%b9%84%ea%b5%90-zdqbFmUHNv\">6. \uc0c1\ud0dc \ud328\ud134\uacfc \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134 \ube44\uad50<\/a><\/li>\n<li><a href=\"#7-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%eb%8b%a8%ec%a0%90-%eb%b0%8f-%ea%b3%a0%eb%a0%a4%ec%82%ac%ed%95%ad-zdqbFmUHNv\">7. \uc0c1\ud0dc \ud328\ud134\uc758 \ub2e8\uc810 \ubc0f \uace0\ub824\uc0ac\ud56d<\/a><\/li>\n<li><a href=\"#8-%ea%b2%b0%eb%a1%a0-%eb%b0%8f-%ec%9a%94%ec%95%bd-zdqbFmUHNv\">8. \uacb0\ub860 \ubc0f \uc694\uc57d<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1 id=\"%eb%b3%b5%ec%9e%a1%ed%95%9c-%ec%83%81%ed%83%9c-%ec%a0%84%ed%99%98-%ea%b4%80%eb%a6%ac%eb%a5%bc-%ec%9c%84%ed%95%9c-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%8b%a4%ec%9a%a9%ec%a0%81-%ec%a0%91-zdqbFmUHNv\">\ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud55c \uc0c1\ud0dc \ud328\ud134\uc758 \uc2e4\uc6a9\uc801 \uc811\uadfc<\/h1>\n<p>\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc5d0\uc11c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub294 \ub9e4\uc6b0 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. \ud2b9\ud788 \ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \ub2e4\uc591\ud55c \uc0c1\ud0dc\uac00 \uc874\uc7ac\ud558\uace0, \uc774\ub4e4 \uac04\uc758 \uc804\ud658\uc774 \ube48\ubc88\ud558\uac8c \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0c1\ud669\uc5d0\uc11c \uc0c1\ud0dc \ud328\ud134\uc740 \ud6a8\uacfc\uc801\uc778 \ud574\uacb0\ucc45\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubcf8 \uae00\uc5d0\uc11c\ub294 \uc0c1\ud0dc \ud328\ud134\uc758 \uac1c\ub150, \uc7a5\uc810, \uad6c\ud604 \ubc29\ubc95, \uadf8\ub9ac\uace0 \uc2e4\uc81c \uc0ac\ub840\ub97c \ud1b5\ud574 \ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc5b4\ub5bb\uac8c \ud6a8\uc728\uc801\uc73c\ub85c \ud560 \uc218 \uc788\ub294\uc9c0\uc5d0 \ub300\ud574 \uc2ec\ub3c4 \uc788\uac8c \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"1-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b0%9c%eb%85%90-zdqbFmUHNv\">1. \uc0c1\ud0dc \ud328\ud134\uc758 \uac1c\ub150<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134(State Pattern)\uc740 \uac1d\uccb4\uc758 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc744 \ubcc0\uacbd\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ub514\uc790\uc778 \ud328\ud134\uc785\ub2c8\ub2e4. \uc774 \ud328\ud134\uc740 \uac1d\uccb4\uac00 \ub0b4\ubd80 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ub3d9\uc791\uc744 \ubcc0\uacbd\ud560 \uc218 \uc788\uac8c \ud574\uc8fc\uba70, \uc0c1\ud0dc \uc804\ud658\uc744 \uad00\ub9ac\ud558\ub294 \ub370 \uc720\uc6a9\ud569\ub2c8\ub2e4. \uc0c1\ud0dc \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uba74 \uc870\uac74\ubb38\uc744 \uc904\uc774\uace0, \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\uc5ec \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ub192\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \uc8fc\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uc0c1\ud669\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\uac1d\uccb4\uc758 \uc0c1\ud0dc\uac00 \uc5ec\ub7ec \uac1c\uc77c \ub54c<\/li>\n<li>\uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc774 \ub2ec\ub77c\uc9c8 \ub54c<\/li>\n<li>\uc0c1\ud0dc \uc804\ud658\uc774 \ubcf5\uc7a1\ud560 \ub54c<\/li>\n<\/ul>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \uc8fc\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uad6c\uc131 \uc694\uc18c\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>Context: \ud604\uc7ac \uc0c1\ud0dc\ub97c \uc720\uc9c0\ud558\uace0, \uc0c1\ud0dc \uc804\ud658\uc744 \uad00\ub9ac\ud558\ub294 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4.<\/li>\n<li>State: \uc0c1\ud0dc\ub97c \uc815\uc758\ud558\ub294 \uc778\ud130\ud398\uc774\uc2a4 \ub610\ub294 \ucd94\uc0c1 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4.<\/li>\n<li>ConcreteState: \uad6c\uccb4\uc801\uc778 \uc0c1\ud0dc\ub97c \uad6c\ud604\ud558\ub294 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2 id=\"2-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%9e%a5%ec%a0%90-zdqbFmUHNv\">2. \uc0c1\ud0dc \ud328\ud134\uc758 \uc7a5\uc810<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \uc5ec\ub7ec \uac00\uc9c0 \uc7a5\uc810\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uccab\uc9f8, \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc744 \ub192\uc785\ub2c8\ub2e4. \uac01 \uc0c1\ud0dc\ub97c \ubcc4\ub3c4\uc758 \ud074\ub798\uc2a4\ub85c \ubd84\ub9ac\ud568\uc73c\ub85c\uc368, \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c \ub85c\uc9c1\uc744 \uba85\ud655\ud558\uac8c \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub458\uc9f8, \uc720\uc9c0\ubcf4\uc218\uc131\uc774 \ud5a5\uc0c1\ub429\ub2c8\ub2e4. \uc0c8\ub85c\uc6b4 \uc0c1\ud0dc\ub97c \ucd94\uac00\ud558\uac70\ub098 \uae30\uc874 \uc0c1\ud0dc\ub97c \uc218\uc815\ud560 \ub54c, \ub2e4\ub978 \uc0c1\ud0dc\uc5d0 \uc601\ud5a5\uc744 \uc8fc\uc9c0 \uc54a\uace0 \ub3c5\ub9bd\uc801\uc73c\ub85c \uc791\uc5c5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc14b\uc9f8, \uc870\uac74\ubb38\uc744 \uc904\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc804\ud1b5\uc801\uc778 \ubc29\ubc95\uc73c\ub85c\ub294 \uc5ec\ub7ec \uc870\uac74\ubb38\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc0c1\ud0dc\ub97c \uad00\ub9ac\ud558\uc9c0\ub9cc, \uc0c1\ud0dc \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uba74 \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c \ud074\ub798\uc2a4\ub97c \ud1b5\ud574 \uc870\uac74\ubb38\uc744 \ub300\uccb4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub137\uc9f8, \ud14c\uc2a4\ud2b8\uac00 \uc6a9\uc774\ud574\uc9d1\ub2c8\ub2e4. \uac01 \uc0c1\ud0dc\uac00 \ub3c5\ub9bd\uc801\uc778 \ud074\ub798\uc2a4\ub85c \uad6c\ud604\ub418\uae30 \ub54c\ubb38\uc5d0, \uac1c\ubcc4\uc801\uc73c\ub85c \ud14c\uc2a4\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"3-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b5%ac%ed%98%84-%eb%b0%a9%eb%b2%95-zdqbFmUHNv\">3. \uc0c1\ud0dc \ud328\ud134\uc758 \uad6c\ud604 \ubc29\ubc95<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134\uc744 \uad6c\ud604\ud558\uae30 \uc704\ud574\uc11c\ub294 \uba3c\uc800 Context \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774 \ud074\ub798\uc2a4\ub294 \ud604\uc7ac \uc0c1\ud0dc\ub97c \uc720\uc9c0\ud558\uace0, \uc0c1\ud0dc \uc804\ud658\uc744 \uad00\ub9ac\ud558\ub294 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc73c\ub85c State \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc815\uc758\ud558\uace0, \uc774\ub97c \uad6c\ud604\ud558\ub294 ConcreteState \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4.<\/p>\n<pre><code>\nclass Context {\n    private State state;\n\n    public Context(State state) {\n        this.state = state;\n    }\n\n    public void setState(State state) {\n        this.state = state;\n    }\n\n    public void request() {\n        state.handle(this);\n    }\n}\n\ninterface State {\n    void handle(Context context);\n}\n\nclass ConcreteStateA implements State {\n    public void handle(Context context) {\n        System.out.println(\"State A handling request.\");\n        context.setState(new ConcreteStateB());\n    }\n}\n\nclass ConcreteStateB implements State {\n    public void handle(Context context) {\n        System.out.println(\"State B handling request.\");\n        context.setState(new ConcreteStateA());\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c Context \ud074\ub798\uc2a4\ub294 \ud604\uc7ac \uc0c1\ud0dc\ub97c \uc720\uc9c0\ud558\uace0, \uc694\uccad\uc774 \ub4e4\uc5b4\uc62c \ub54c \ud574\ub2f9 \uc0c1\ud0dc\uc758 handle \uba54\uc11c\ub4dc\ub97c \ud638\ucd9c\ud569\ub2c8\ub2e4. ConcreteStateA\uc640 ConcreteStateB\ub294 \uac01\uac01\uc758 \uc0c1\ud0dc\ub97c \uad6c\ud604\ud558\uba70, \uc0c1\ud0dc \uc804\ud658\uc744 \uad00\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n<h2 id=\"4-%ec%8b%a4%ec%a0%9c-%ec%82%ac%eb%a1%80-%ec%97%b0%ea%b5%ac-%ea%b2%8c%ec%9e%84-%ea%b0%9c%eb%b0%9c%ec%97%90%ec%84%9c%ec%9d%98-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4-zdqbFmUHNv\">4. \uc2e4\uc81c \uc0ac\ub840 \uc5f0\uad6c: \uac8c\uc784 \uac1c\ubc1c\uc5d0\uc11c\uc758 \uc0c1\ud0dc \ud328\ud134<\/h2>\n<p>\uac8c\uc784 \uac1c\ubc1c\uc5d0\uc11c\ub294 \uce90\ub9ad\ud130\uc758 \uc0c1\ud0dc \uad00\ub9ac\uac00 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uce90\ub9ad\ud130\ub294 &#8216;\ub300\uae30&#8217;, &#8216;\uc774\ub3d9&#8217;, &#8216;\uacf5\uaca9&#8217;, &#8216;\ubc29\uc5b4&#8217;\uc640 \uac19\uc740 \ub2e4\uc591\ud55c \uc0c1\ud0dc\ub97c \uac00\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0c1\ud0dc\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \uad00\ub9ac\ud558\uae30 \uc704\ud574 \uc0c1\ud0dc \ud328\ud134\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uce90\ub9ad\ud130\uc758 \uc0c1\ud0dc\ub97c \uad00\ub9ac\ud558\ub294 Context \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\uace0, \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c ConcreteState \ud074\ub798\uc2a4\ub97c \uad6c\ud604\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uce90\ub9ad\ud130\uc758 \ud589\ub3d9\uc744 \uba85\ud655\ud558\uac8c \uc815\uc758\ud558\uace0, \uc0c1\ud0dc \uc804\ud658\uc744 \uc27d\uac8c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>\nclass CharacterContext {\n    private CharacterState state;\n\n    public CharacterContext(CharacterState state) {\n        this.state = state;\n    }\n\n    public void setState(CharacterState state) {\n        this.state = state;\n    }\n\n    public void performAction() {\n        state.perform(this);\n    }\n}\n\ninterface CharacterState {\n    void perform(CharacterContext context);\n}\n\nclass IdleState implements CharacterState {\n    public void perform(CharacterContext context) {\n        System.out.println(\"Character is idle.\");\n        context.setState(new MoveState());\n    }\n}\n\nclass MoveState implements CharacterState {\n    public void perform(CharacterContext context) {\n        System.out.println(\"Character is moving.\");\n        context.setState(new AttackState());\n    }\n}\n\nclass AttackState implements CharacterState {\n    public void perform(CharacterContext context) {\n        System.out.println(\"Character is attacking.\");\n        context.setState(new IdleState());\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c \uce90\ub9ad\ud130\ub294 IdleState\uc5d0\uc11c \uc2dc\uc791\ud558\uc5ec MoveState\ub85c \uc804\ud658\ub418\uace0, \uc774\ud6c4 AttackState\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubc29\uc2dd\uc73c\ub85c \uce90\ub9ad\ud130\uc758 \ud589\ub3d9\uc744 \uba85\ud655\ud558\uac8c \uc815\uc758\ud558\uace0, \uc0c1\ud0dc \uc804\ud658\uc744 \uc27d\uac8c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"5-%eb%b3%b5%ec%9e%a1%ed%95%9c-%ec%8b%9c%ec%8a%a4%ed%85%9c%ec%97%90%ec%84%9c%ec%9d%98-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4-%ed%99%9c%ec%9a%a9-zdqbFmUHNv\">5. \ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c\uc758 \uc0c1\ud0dc \ud328\ud134 \ud65c\uc6a9<\/h2>\n<p>\ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \uc5ec\ub7ec \uac1c\uc758 \uc0c1\ud0dc\uac00 \ub3d9\uc2dc\uc5d0 \uc874\uc7ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uacbd\uc6b0, \uc0c1\ud0dc \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uc5ec \uac01 \uc0c1\ud0dc\ub97c \ub3c5\ub9bd\uc801\uc73c\ub85c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc8fc\ubb38 \ucc98\ub9ac \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 &#8216;\uc8fc\ubb38 \uc0dd\uc131&#8217;, &#8216;\uc8fc\ubb38 \uacb0\uc81c&#8217;, &#8216;\uc8fc\ubb38 \ubc30\uc1a1&#8217;, &#8216;\uc8fc\ubb38 \uc644\ub8cc&#8217;\uc640 \uac19\uc740 \uc5ec\ub7ec \uc0c1\ud0dc\uac00 \uc874\uc7ac\ud569\ub2c8\ub2e4.<\/p>\n<p>\uc8fc\ubb38 \ucc98\ub9ac \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uac01 \uc0c1\ud0dc\ub97c \uad00\ub9ac\ud558\uae30 \uc704\ud574 Context \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\uace0, \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c ConcreteState \ud074\ub798\uc2a4\ub97c \uad6c\ud604\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc8fc\ubb38\uc758 \uac01 \ub2e8\uacc4\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \uc774\ubca4\ud2b8\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>\nclass OrderContext {\n    private OrderState state;\n\n    public OrderContext(OrderState state) {\n        this.state = state;\n    }\n\n    public void setState(OrderState state) {\n        this.state = state;\n    }\n\n    public void processOrder() {\n        state.process(this);\n    }\n}\n\ninterface OrderState {\n    void process(OrderContext context);\n}\n\nclass CreatedState implements OrderState {\n    public void process(OrderContext context) {\n        System.out.println(\"Order created.\");\n        context.setState(new PaidState());\n    }\n}\n\nclass PaidState implements OrderState {\n    public void process(OrderContext context) {\n        System.out.println(\"Order paid.\");\n        context.setState(new ShippedState());\n    }\n}\n\nclass ShippedState implements OrderState {\n    public void process(OrderContext context) {\n        System.out.println(\"Order shipped.\");\n        context.setState(new CompletedState());\n    }\n}\n\nclass CompletedState implements OrderState {\n    public void process(OrderContext context) {\n        System.out.println(\"Order completed.\");\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c \uc8fc\ubb38\uc740 CreatedState\uc5d0\uc11c \uc2dc\uc791\ud558\uc5ec PaidState\ub85c \uc804\ud658\ub418\uace0, \uc774\ud6c4 ShippedState\uc640 CompletedState\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubc29\uc2dd\uc73c\ub85c \uc8fc\ubb38 \ucc98\ub9ac \uc2dc\uc2a4\ud15c\uc758 \uac01 \ub2e8\uacc4\ub97c \uba85\ud655\ud558\uac8c \uc815\uc758\ud558\uace0, \uc0c1\ud0dc \uc804\ud658\uc744 \uc27d\uac8c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"6-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ea%b3%bc-%eb%8b%a4%eb%a5%b8-%eb%94%94%ec%9e%90%ec%9d%b8-%ed%8c%a8%ed%84%b4-%eb%b9%84%ea%b5%90-zdqbFmUHNv\">6. \uc0c1\ud0dc \ud328\ud134\uacfc \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134 \ube44\uad50<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134\uacfc \ube44\uad50\ud588\uc744 \ub54c \uba87 \uac00\uc9c0 \ucc28\ubcc4\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc804\ub7b5 \ud328\ud134(Strategy Pattern)\uc740 \uc54c\uace0\ub9ac\uc998\uc744 \ucea1\uc290\ud654\ud558\uc5ec \uc11c\ub85c \uad50\ud658 \uac00\ub2a5\ud558\uac8c \ub9cc\ub4dc\ub294 \ubc18\uba74, \uc0c1\ud0dc \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc744 \ubcc0\uacbd\ud569\ub2c8\ub2e4. \uc989, \uc804\ub7b5 \ud328\ud134\uc740 \uc54c\uace0\ub9ac\uc998\uc758 \ubcc0\uacbd\uc5d0 \uc911\uc810\uc744 \ub450\uace0, \uc0c1\ud0dc \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uc0c1\ud0dc \ubcc0\ud654\uc5d0 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4.<\/p>\n<p>\ub610\ud55c, \ucee4\ub9e8\ub4dc \ud328\ud134(Command Pattern)\uc740 \uc694\uccad\uc744 \uac1d\uccb4\ub85c \ucea1\uc290\ud654\ud558\uc5ec \uc694\uccad\uc758 \ub9e4\uac1c\ubcc0\uc218\ub97c \uc800\uc7a5\ud558\uac70\ub098 \ub85c\uadf8\ub97c \ub0a8\uae30\ub294 \ub370 \uc720\uc6a9\ud569\ub2c8\ub2e4. \ubc18\uba74, \uc0c1\ud0dc \ud328\ud134\uc740 \uac1d\uccb4\uc758 \ub0b4\ubd80 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc744 \ubcc0\uacbd\ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4.<\/p>\n<p>\uc0c1\ud0dc \ud328\ud134\uacfc \uc635\uc800\ubc84 \ud328\ud134(Observer Pattern)\ub3c4 \ube44\uad50\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc635\uc800\ubc84 \ud328\ud134\uc740 \uac1d\uccb4 \uac04\uc758 \uc77c\ub300\ub2e4 \uad00\uacc4\ub97c \uc815\uc758\ud558\uc5ec \ud55c \uac1d\uccb4\uc758 \uc0c1\ud0dc \ubcc0\ud654\uac00 \ub2e4\ub978 \uac1d\uccb4\uc5d0 \uc790\ub3d9\uc73c\ub85c \ud1b5\uc9c0\ub418\ub3c4\ub85d \ud569\ub2c8\ub2e4. \ubc18\uba74, \uc0c1\ud0dc \ud328\ud134\uc740 \uac1d\uccb4\uc758 \ub0b4\ubd80 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc744 \ubcc0\uacbd\ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4.<\/p>\n<h2 id=\"7-%ec%83%81%ed%83%9c-%ed%8c%a8%ed%84%b4%ec%9d%98-%eb%8b%a8%ec%a0%90-%eb%b0%8f-%ea%b3%a0%eb%a0%a4%ec%82%ac%ed%95%ad-zdqbFmUHNv\">7. \uc0c1\ud0dc \ud328\ud134\uc758 \ub2e8\uc810 \ubc0f \uace0\ub824\uc0ac\ud56d<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \ub9ce\uc740 \uc7a5\uc810\uc744 \uc81c\uacf5\ud558\uc9c0\ub9cc \uba87 \uac00\uc9c0 \ub2e8\uc810\ub3c4 \uc874\uc7ac\ud569\ub2c8\ub2e4. \uccab\uc9f8, \ud074\ub798\uc2a4 \uc218\uac00 \uc99d\uac00\ud569\ub2c8\ub2e4. \uac01 \uc0c1\ud0dc\ub97c \ubcc4\ub3c4\uc758 \ud074\ub798\uc2a4\ub85c \uad6c\ud604\ud574\uc57c \ud558\ubbc0\ub85c \ud074\ub798\uc2a4 \uc218\uac00 \ub9ce\uc544\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ucf54\ub4dc\uc758 \ubcf5\uc7a1\uc131\uc744 \uc99d\uac00\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub458\uc9f8, \ubaa8\ub4e0 \uc0c1\ud0dc\ub97c \ubbf8\ub9ac \uc815\uc758\ud574\uc57c \ud569\ub2c8\ub2e4. \uc0c8\ub85c\uc6b4 \uc0c1\ud0dc\uac00 \ucd94\uac00\ub420 \uacbd\uc6b0 \uae30\uc874 \ucf54\ub4dc\ub97c \uc218\uc815\ud574\uc57c \ud558\ubbc0\ub85c \uc720\uc5f0\uc131\uc774 \ub5a8\uc5b4\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc14b\uc9f8, \ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \ub85c\uc9c1\uc774 \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0\ub294 \uc624\ud788\ub824 \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub530\ub77c\uc11c \uc0c1\ud0dc \ud328\ud134\uc744 \uc0ac\uc6a9\ud560 \ub54c\ub294 \uc774\ub7ec\ud55c \ub2e8\uc810\uc744 \uace0\ub824\ud574\uc57c \ud558\uba70, \uc0c1\ud669\uc5d0 \ub9de\uac8c \uc801\uc808\ud788 \uc801\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<h2 id=\"8-%ea%b2%b0%eb%a1%a0-%eb%b0%8f-%ec%9a%94%ec%95%bd-zdqbFmUHNv\">8. \uacb0\ub860 \ubc0f \uc694\uc57d<\/h2>\n<p>\uc0c1\ud0dc \ud328\ud134\uc740 \ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud55c \ud6a8\uacfc\uc801\uc778 \ub514\uc790\uc778 \ud328\ud134\uc785\ub2c8\ub2e4. \uc774 \ud328\ud134\uc740 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ub192\uc774\uba70, \uc870\uac74\ubb38\uc744 \uc904\uc774\uace0 \ud14c\uc2a4\ud2b8\ub97c \uc6a9\uc774\ud558\uac8c \ud569\ub2c8\ub2e4. \uac8c\uc784 \uac1c\ubc1c\uc774\ub098 \uc8fc\ubb38 \ucc98\ub9ac \uc2dc\uc2a4\ud15c\uacfc \uac19\uc740 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc720\uc6a9\ud558\uac8c \ud65c\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc0c1\ud0dc \ud328\ud134\uc744 \uad6c\ud604\ud558\uae30 \uc704\ud574\uc11c\ub294 Context \ud074\ub798\uc2a4\uc640 State \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc815\uc758\ud558\uace0, \uac01 \uc0c1\ud0dc\uc5d0 \ub300\ud55c ConcreteState \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uac1d\uccb4\uc758 \ub0b4\ubd80 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ud589\ub3d9\uc744 \ubcc0\uacbd\ud560 \uc218 \uc788\uc73c\uba70, \ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub3c4 \ud6a8\uacfc\uc801\uc73c\ub85c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub9c8\uc9c0\ub9c9\uc73c\ub85c, \uc0c1\ud0dc \ud328\ud134\uc740 \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134\uacfc \ube44\uad50\ud588\uc744 \ub54c \uac1d\uccb4\uc758 \uc0c1\ud0dc \ubcc0\ud654\uc5d0 \uc911\uc810\uc744 \ub450\uba70, \ud074\ub798\uc2a4 \uc218\uac00 \uc99d\uac00\ud558\ub294 \ub2e8\uc810\uc774 \uc788\uc9c0\ub9cc \uc801\uc808\ud788 \ud65c\uc6a9\ud558\uba74 \ub9ce\uc740 \uc774\uc810\uc744 \uc81c\uacf5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c\uc5d0\uc11c \ud6a8\uacfc\uc801\uc778 \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud574\uc11c\ub294 \uc0c1\ud669\uc5d0 \ub9de\uac8c \uc801\uc808\ud55c \ub514\uc790\uc778 \ud328\ud134\uc744 \uc120\ud0dd\ud558\uace0 \uc801\uc6a9\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc758 \ud6a8\uc728\uc131\uc744 \ub192\uc774\uace0, \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ubaa9\ucc28 \ubcf5\uc7a1\ud55c \uc0c1\ud0dc \uc804\ud658 \uad00\ub9ac\ub97c \uc704\ud55c \uc0c1\ud0dc \ud328\ud134\uc758 \uc2e4\uc6a9\uc801 \uc811\uadfc 1. \uc0c1\ud0dc \ud328\ud134\uc758 \uac1c\ub150 2. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":33704,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1957],"tags":[2068,2523,471],"class_list":["post-50800","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-handle","tag-pattern","tag-state"],"acf":[],"_links":{"self":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts\/50800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/comments?post=50800"}],"version-history":[{"count":0,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts\/50800\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/media\/33704"}],"wp:attachment":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/media?parent=50800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/categories?post=50800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/tags?post=50800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}