Package java.util

Examples of java.util.ServiceLoader$ServiceIterator

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public class EncryptUriDescriptorTest {

  @Test
  @SuppressWarnings("rawtypes")
  public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load( UrlRewriteStepDescriptor.class );
    Iterator iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof EncryptUriDescriptor ) {
        return;
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public class EncryptDecryptUriProcessorTest {

  @SuppressWarnings("rawtypes")
  @Test
  public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load( UrlRewriteStepProcessor.class );
    Iterator iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof EncryptUriProcessor ) {
        return;
      }
    }
    fail( "Failed to find " + EncryptUriProcessor.class.getName() + " via service loader." );

    loader = ServiceLoader.load( UrlRewriteStepProcessor.class );
    iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof DecryptUriProcessor ) {
        return;
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public class NameNodeHaDispatchDeploymentContributorTest {

   @Test
   public void testServiceLoader() throws Exception {
      ServiceLoader loader = ServiceLoader.load( ProviderDeploymentContributor.class );
      Iterator iterator = loader.iterator();
      assertThat( "Service iterator empty.", iterator.hasNext() );
      while( iterator.hasNext() ) {
         Object object = iterator.next();
         if( object instanceof NameNodeHaDispatchDeploymentContributor) {
            return;
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public class ResourceManagerDeploymentContributorTest {

  @SuppressWarnings("rawtypes")
  @Test
  public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load( ServiceDeploymentContributor.class );
    Iterator iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof ResourceManagerDeploymentContributor ) {
        return;
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public class JerseyDeploymentContributorTest {

  @Test
  public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load( ProviderDeploymentContributor.class );
    Iterator iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof JerseyDispatchDeploymentContributor ) {
        return;
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    @SuppressWarnings( { "nls", "unchecked" })
    public void test_loadLjava_lang_ClassLjava_lang_ClassLoader()
            throws MalformedURLException {
        URLClassLoader ucl = new URLClassLoader(new URL[] { jarFile });
        // normal config file
        ServiceLoader serviceLoader = ServiceLoader.load(Service.class, ucl);
        Iterator itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfService", ((Service) itr.next())
                .myNameIs());
        assertFalse(itr.hasNext());

        // class that can not cast correctly
        serviceLoader = ServiceLoader.load(ServiceFinalClass.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        try {
            itr.next();
            fail("Should throw ServiceConfigurationError");
        } catch (ServiceConfigurationError e) {
            // expected
        }

        // abstract class with comment in config file
        serviceLoader = ServiceLoader.load(AbstractService.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfAbstractService", ((AbstractService) itr
                .next()).myNameIs());
        assertFalse(itr.hasNext());

        // one service with two implementation class
        serviceLoader = ServiceLoader.load(ServiceMoreThanOne.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        String name = ((ServiceMoreThanOne) itr.next()).myNameIs();
        if ("ImplementationOfServiceMoreThanOne1".equals(name)) {
            assertEquals("ImplementationOfServiceMoreThanOne2",
                    ((ServiceMoreThanOne) itr.next()).myNameIs());
        } else if ("ImplementationOfServiceMoreThanOne2".equals(name)) {
            assertEquals("ImplementationOfServiceMoreThanOne1",
                    ((ServiceMoreThanOne) itr.next()).myNameIs());
        } else {
            fail("Should load ImplementationOfServiceMoreThanOne1 or ImplementationOfServiceMoreThanOne2");
        }
        assertFalse(itr.hasNext());

        // config file only contains comments
        serviceLoader = ServiceLoader.load(ServiceForAllCommentTest.class, ucl);
        itr = serviceLoader.iterator();
        assertFalse(itr.hasNext());
        try {
            itr.next();
            fail("Should throw NoSuchElementException");
        } catch (NoSuchElementException e) {
            // expected
        }

        // empty config file
        serviceLoader = ServiceLoader.load(ServiceForEmptyTest.class, ucl);
        itr = serviceLoader.iterator();
        assertFalse(itr.hasNext());
        try {
            itr.next();
            fail("Should throw NoSuchElementException");
        } catch (NoSuchElementException e) {
            // expected
        }

        // config file with illegal char
        serviceLoader = ServiceLoader
                .load(ServiceForIllegalNameTest.class, ucl);
        itr = serviceLoader.iterator();
        try {
            itr.hasNext();
            fail("Should throw ServiceConfigurationError");
        } catch (ServiceConfigurationError e) {
            // expected
        }

        // config file with legal string, but the class does not exist
        serviceLoader = ServiceLoader.load(ServiceForWrongNameTest.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        try {
            itr.next();
            fail("Should throw ServiceConfigurationError");
        } catch (ServiceConfigurationError e) {
            // expected
        }

        // config file for an internal class
        serviceLoader = ServiceLoader.load(
                AbstractService.InternalService.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfAbstractServiceInternalService",
                ((AbstractService.InternalService) itr.next())
                        .myInternalNameIs());
        assertFalse(itr.hasNext());

        // config files in the 2 jar files
        serviceLoader = ServiceLoader.load(ServiceIn2File.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceIn2File1", ((ServiceIn2File) itr
                .next()).myNameIs());
        assertFalse(itr.hasNext());
        // add the second file
        URL jarFile2 = prepairJar("hyts_services2.jar");
        URLClassLoader ucl2 = new URLClassLoader(
                new URL[] { jarFile, jarFile2 });
        serviceLoader = ServiceLoader.load(ServiceIn2File.class, ucl2);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        name = ((ServiceIn2File) itr.next()).myNameIs();
        if ("ImplementationOfServiceIn2File1".equals(name)) {
            assertEquals("ImplementationOfServiceIn2File2",
                    ((ServiceIn2File) itr.next()).myNameIs());
        } else if ("ImplementationOfServiceIn2File2".equals(name)) {
            assertEquals("ImplementationOfServiceIn2File1",
                    ((ServiceIn2File) itr.next()).myNameIs());
        } else {
            fail("Should load ImplementationOfServiceIn2File1 or ImplementationOfServiceIn2File2");
        }
        assertFalse(itr.hasNext());

        // same config files in 2 jar files
        serviceLoader = ServiceLoader.load(ServiceDuplicateIn2File.class, ucl2);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceDuplicateIn2File_1",
                ((ServiceDuplicateIn2File) itr.next()).myNameIs());
        assertFalse(itr.hasNext());
        ucl2 = new URLClassLoader(new URL[] { jarFile2, jarFile });
        serviceLoader = ServiceLoader.load(ServiceDuplicateIn2File.class, ucl2);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceDuplicateIn2File_2",
                ((ServiceDuplicateIn2File) itr.next()).myNameIs());
        assertFalse(itr.hasNext());

        // one config file in one jar, another empty config in another jar.
        serviceLoader = ServiceLoader.load(ServiceIn2FileWithEmptyConfig.class,
                ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceIn2FileWithEmptyConfig",
                ((ServiceIn2FileWithEmptyConfig) itr.next()).myNameIs());
        assertFalse(itr.hasNext());
        ucl2 = new URLClassLoader(new URL[] { jarFile, jarFile2 });
        serviceLoader = ServiceLoader.load(ServiceIn2FileWithEmptyConfig.class,
                ucl2);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceIn2FileWithEmptyConfig",
                ((ServiceIn2FileWithEmptyConfig) itr.next()).myNameIs());
        assertFalse(itr.hasNext());

        // config file with duplicate items
        serviceLoader = ServiceLoader.load(ServiceWithDuplicateSons.class, ucl);
        itr = serviceLoader.iterator();
        assertTrue(itr.hasNext());
        assertEquals("ImplementationOfServiceWithDuplicateSons",
                ((ServiceWithDuplicateSons) itr.next()).myNameIs());
        assertFalse(itr.hasNext());

        // can not load by system classloader
        serviceLoader = ServiceLoader.load(Service.class, ClassLoader
                .getSystemClassLoader());
        assertFalse(serviceLoader.iterator().hasNext());

        // can not load by Thread.currentThread().getContextClassLoader()
        serviceLoader = ServiceLoader.load(Service.class, Thread
                .currentThread().getContextClassLoader());
        assertFalse(serviceLoader.iterator().hasNext());

        serviceLoader = ServiceLoader.load(Service.class, Service.class
                .getClassLoader());
        assertFalse(serviceLoader.iterator().hasNext());

        // String is a final class, no sub-class for it
        serviceLoader = ServiceLoader.load(String.class, ucl);
        assertFalse(serviceLoader.iterator().hasNext());
    }
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    /**
     * @tests {@link java.util.ServiceLoader#load(java.lang.Class)}.
     */
    @SuppressWarnings( { "nls", "unchecked" })
    public void test_loadLjava_lang_Class() {
        ServiceLoader serviceLoader = ServiceLoader.load(Service.class);
        assertFalse(serviceLoader.iterator().hasNext());
        // String is a final class, no sub-class for it
        serviceLoader = ServiceLoader.load(String.class);
        assertFalse(serviceLoader.iterator().hasNext());
    }
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     * @tests {@link java.util.ServiceLoader#toString()}.
     */
    @SuppressWarnings( { "unchecked", "nls" })
    public void test_toString() {
        URLClassLoader ucl = new URLClassLoader(new URL[] { jarFile });
        ServiceLoader serviceLoader = ServiceLoader.load(Service.class, ucl);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.load(String.class, ucl);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.load(Service.class);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.load(String.class);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.loadInstalled(Service.class);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.loadInstalled(String.class);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.load(null, ucl);
        assertNotNull(serviceLoader);
        try {
            serviceLoader.toString();
            fail("Should throw NullPointerException");
        } catch (NullPointerException e) {
            // expected
        }

        serviceLoader = ServiceLoader.load(null, null);
        assertNotNull(serviceLoader);
        try {
            serviceLoader.toString();
            fail("Should throw NullPointerException");
        } catch (NullPointerException e) {
            // expected
        }

        serviceLoader = ServiceLoader.load(Service.class, null);
        assertTrue(serviceLoader.toString().length() > 0);

        serviceLoader = ServiceLoader.load(null);
        assertNotNull(serviceLoader);
        try {
            serviceLoader.toString();
            fail("Should throw NullPointerException");
        } catch (NullPointerException e) {
            // expected
        }

        serviceLoader = ServiceLoader.loadInstalled(null);
        assertNotNull(serviceLoader);
        try {
            serviceLoader.toString();
            fail("Should throw NullPointerException");
        } catch (NullPointerException e) {
            // expected
        }
    }
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@PrepareForTest(ServiceLoader.class)
public class ServiceLoaderTest {

    @Test(expected = IllegalArgumentException.class)
    public void supportsMockingServiceLoader() throws Exception {
        final ServiceLoader mock = mock(ServiceLoader.class);

        doThrow(new IllegalArgumentException("something")).when(mock).reload();

        mock.reload();
    }
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public class OozieDeploymentContributorTest {

  @Test
  public void testServiceLoader() throws Exception {
    ServiceLoader loader = ServiceLoader.load( ServiceDeploymentContributor.class );
    Iterator iterator = loader.iterator();
    assertThat( "Service iterator empty.", iterator.hasNext() );
    while( iterator.hasNext() ) {
      Object object = iterator.next();
      if( object instanceof OozieDeploymentContributor ) {
        return;
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  • org.apache.hadoop.gateway.encrypturi.api.DecryptUriDescriptorTest
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