Examples of com.google.inject.Module

com.google.inject.Module
A module contributes configuration information, typically interface bindings, which will be used to create an {@link Injector}. A guice-based application is ultimately composed of little more than a set of {@code Module}s and some bootstrapping code.
Your Module classes can use a more streamlined syntax by extending {@link AbstractModule} rather than implementing this interface directly.

    assertSetVisitor(Key.get(setOfInteger), intType, setOf(module), BOTH, false, 0,
        providerInstance(1));
  }


  public void testMultibinderSetForbidsDuplicateElements() {
    Module module1 = new AbstractModule() {
      protected void configure() {
        final Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toProvider(Providers.of("A"));
      }
    };
    Module module2 = new AbstractModule() {
      protected void configure() {
        final Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("A");
      }
    };
    Injector injector = Guice.createInjector(module1, module2);


    try {
      injector.getInstance(Key.get(setOfString));
      fail();
    } catch (ProvisionException expected) {
      assertContains(expected.getMessage(),
          "1) Set injection failed due to duplicated element \"A\"",
          "Bound at " + module1.getClass().getName(),
          "Bound at " + module2.getClass().getName());
    }


    // But we can still visit the module!
    assertSetVisitor(Key.get(setOfString), stringType, setOf(module1, module2), MODULE, false, 0,
        instance("A"), instance("A"));

View Full Code Here

      public String toString() {
        return String.format("ValueType(%d,%d)", a, b);
      }
    }


    Module module1 = new AbstractModule() {
      protected void configure() {
        final Multibinder<ValueType> multibinder =
            Multibinder.newSetBinder(binder(), ValueType.class);
        multibinder.addBinding().toProvider(Providers.of(new ValueType(1, 2)));
      }
    };
    Module module2 = new AbstractModule() {
      protected void configure() {
        final Multibinder<ValueType> multibinder =
            Multibinder.newSetBinder(binder(), ValueType.class);
        multibinder.addBinding().toInstance(new ValueType(1, 3));
      }
    };
    Injector injector = Guice.createInjector(module1, module2);


    TypeLiteral<ValueType> valueType = TypeLiteral.get(ValueType.class);
    TypeLiteral<Set<ValueType>> setOfValueType = new TypeLiteral<Set<ValueType>>() {};
    try {
      injector.getInstance(Key.get(setOfValueType));
      fail();
    } catch (ProvisionException expected) {
      assertContains(expected.getMessage(),
          "1) Set injection failed due to multiple elements comparing equal:",
          "\"ValueType(1,2)\"",
          "bound at " + module1.getClass().getName(),
          "\"ValueType(1,3)\"",
          "bound at " + module2.getClass().getName());
    }


    // But we can still visit the module!
    assertSetVisitor(Key.get(setOfValueType), valueType, setOf(module1, module2), MODULE, false, 0,
        instance(new ValueType(1, 2)), instance(new ValueType(1, 3)));

View Full Code Here

    assertSetVisitor(Key.get(setOfValueType), valueType, setOf(module1, module2), MODULE, false, 0,
        instance(new ValueType(1, 2)), instance(new ValueType(1, 3)));
  }


  public void testMultibinderSetPermitDuplicateElements() {
    Module ab = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("A");
        multibinder.addBinding().toInstance("B");
      }
    };
    Module bc = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.permitDuplicates();
        multibinder.addBinding().toInstance("B");
        multibinder.addBinding().toInstance("C");

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    assertSetVisitor(Key.get(setOfString), stringType, setOf(ab, bc), BOTH, true, 0,
        instance("A"), instance("B"), instance("C"));
  }


  public void testMultibinderSetPermitDuplicateCallsToPermitDuplicates() {
    Module ab = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.permitDuplicates();
        multibinder.addBinding().toInstance("A");
        multibinder.addBinding().toInstance("B");
      }
    };
    Module bc = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.permitDuplicates();
        multibinder.addBinding().toInstance("B");
        multibinder.addBinding().toInstance("C");

View Full Code Here


  /**
   * With overrides, we should get the union of all multibindings.
   */
  public void testModuleOverrideAndMultibindings() {
    Module ab = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("A");
        multibinder.addBinding().toInstance("B");
      }
    };
    Module cd = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("C");
        multibinder.addBinding().toInstance("D");
      }
    };
    Module ef = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("E");
        multibinder.addBinding().toInstance("F");
      }
    };


    Module abcd = Modules.override(ab).with(cd);
    Injector injector = Guice.createInjector(abcd, ef);
    assertEquals(ImmutableSet.of("A", "B", "C", "D", "E", "F"),
        injector.getInstance(Key.get(setOfString)));


    assertSetVisitor(Key.get(setOfString), stringType, setOf(abcd, ef), BOTH, false, 0,

View Full Code Here


  /**
   * With overrides, we should get the union of all multibindings.
   */
  public void testModuleOverrideAndMultibindingsWithPermitDuplicates() {
    Module abc = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("A");
        multibinder.addBinding().toInstance("B");
        multibinder.addBinding().toInstance("C");
        multibinder.permitDuplicates();
      }
    };
    Module cd = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("C");
        multibinder.addBinding().toInstance("D");
        multibinder.permitDuplicates();
      }
    };
    Module ef = new AbstractModule() {
      protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("E");
        multibinder.addBinding().toInstance("F");
        multibinder.permitDuplicates();
      }
    };


    Module abcd = Modules.override(abc).with(cd);
    Injector injector = Guice.createInjector(abcd, ef);
    assertEquals(ImmutableSet.of("A", "B", "C", "D", "E", "F"),
        injector.getInstance(Key.get(setOfString)));


    assertSetVisitor(Key.get(setOfString), stringType, setOf(abcd, ef), BOTH, true, 0,

View Full Code Here


  /**
   * Doubly-installed modules should not conflict, even when one is overridden.
   */
  public void testModuleOverrideRepeatedInstallsAndMultibindings_toInstance() {
    Module ab = new AbstractModule() {
      @Override protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toInstance("A");
        multibinder.addBinding().toInstance("B");
      }

View Full Code Here

    assertEquals(ImmutableSet.of("A", "B"),
        injector.getInstance(Key.get(setOfString)));
  }


  public void testModuleOverrideRepeatedInstallsAndMultibindings_toKey() {
    Module ab = new AbstractModule() {
      @Override protected void configure() {
        Key<String> aKey = Key.get(String.class, Names.named("A_string"));
        Key<String> bKey = Key.get(String.class, Names.named("B_string"));
        bind(aKey).toInstance("A");
        bind(bKey).toInstance("B");

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    assertEquals(ImmutableSet.of("A", "B"),
        injector.getInstance(Key.get(setOfString)));
  }


  public void testModuleOverrideRepeatedInstallsAndMultibindings_toProviderInstance() {
    Module ab = new AbstractModule() {
      @Override protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toProvider(Providers.of("A"));
        multibinder.addBinding().toProvider(Providers.of("B"));
      }

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      return "B";
    }
  }


  public void testModuleOverrideRepeatedInstallsAndMultibindings_toProviderKey() {
    Module ab = new AbstractModule() {
      @Override protected void configure() {
        Multibinder<String> multibinder = Multibinder.newSetBinder(binder(), String.class);
        multibinder.addBinding().toProvider(Key.get(AStringProvider.class));
        multibinder.addBinding().toProvider(Key.get(BStringProvider.class));
      }

View Full Code Here

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