org.apache.shindig.config.ExpressionContainerConfig java code examples

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@Override
protected BasicContainerConfig getTemporaryConfig(boolean copyValues) {
 ExpressionContainerConfig tmp = new ExpressionContainerConfig(getExpressions());
 if (copyValues) {
  tmp.rawConfig = deepCopyConfig(rawConfig);
  tmp.config = deepCopyConfig(config);
 }
 return tmp;
}

@Override
public Object getProperty(String container, String property) {
 if (property.startsWith("${")) {
  // An expression!
  try {
   ValueExpression expression = expressions.parse(property, Object.class);
   return expression.getValue(createExpressionContext(container));
  } catch (ELException e) {
   return null;
  }
 }
 return super.getProperty(container, property);
}

@Test
public void testCommonEnvironmentAddedToAllContainers() throws Exception {
 // We use a JSON Object here to guarantee that we're well formed up front.
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{DEFAULT_CONTAINER, "testContainer"});
 json.put("port", "${SERVER_PORT}");
 json.put("host", "${SERVER_HOST}");
 createConfigForTest(createTemporaryFile(json, ".json").getAbsolutePath());
 assertEquals("8080", config.getString(DEFAULT_CONTAINER, "port"));
 assertEquals("8080", config.getString("testContainer", "port"));
 assertEquals("localhost", config.getString(DEFAULT_CONTAINER, "host"));
 assertEquals("localhost", config.getString("testContainer", "host"));
}

@Test
public void parseBasicConfig() throws Exception {
 createConfigForTest(createDefaultContainer().getAbsolutePath());
 assertEquals(1, config.getContainers().size());
 for (String container : config.getContainers()) {
  assertEquals(DEFAULT_CONTAINER, container);
 }
 String value = config.getString(DEFAULT_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nested = config.getMap(DEFAULT_CONTAINER, NESTED_KEY);
 String nestedValue = nested.get(NESTED_NAME).toString();
 assertEquals(NESTED_VALUE, nestedValue);
}

@Test
public void parseWithDefaultInheritance() throws Exception {
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{CHILD_CONTAINER});
 json.put(PARENT_KEY, DEFAULT_CONTAINER);
 json.put(ARRAY_NAME, ARRAY_ALT_VALUE);
 // small nested data.
 JSONObject nested = new JSONObject();
 nested.put(NESTED_NAME, NESTED_ALT_VALUE);
 json.put(NESTED_KEY, nested);
 File childFile = createTemporaryFile(json, ".json");
 File parentFile = createDefaultContainer();
 createConfigForTest(childFile.getAbsolutePath() +
   JsonContainerConfigLoader.FILE_SEPARATOR + parentFile.getAbsolutePath());
 String value = config.getString(CHILD_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nestedObj = config.getMap(CHILD_CONTAINER, NESTED_KEY);
 String nestedValue = nestedObj.get(NESTED_NAME).toString();
 assertEquals(NESTED_ALT_VALUE, nestedValue);
 String arrayValue = config.getString(CHILD_CONTAINER, ARRAY_NAME);
 assertEquals(ARRAY_ALT_VALUE, arrayValue);
 // Verify that the parent value wasn't overwritten as well.
 List<String> actual = new ArrayList<String>();
 for (Object val : config.getList(DEFAULT_CONTAINER, ARRAY_NAME)) {
  actual.add(val.toString());
 }
 List<String> expected = Arrays.asList(ARRAY_VALUE);
 assertEquals(expected, actual);
}

@Before
public void setUp() {
 config = new ExpressionContainerConfig(Expressions.forTesting());
}

@Test
public void testNullEntriesOverrideEntriesInParent() throws Exception {
 // We use JSON Objects here to guarantee that we're well formed up front.
 JSONObject parent = new JSONObject("{ 'gadgets.container' : ['default'], features : { osapi : 'foo' }}");
 JSONObject child = new JSONObject("{ 'gadgets.container' : ['child'], features : null}");
 JSONObject grand = new JSONObject("{ 'gadgets.container' : ['grand'], parent : 'child'}");
 createConfigForTest(createTemporaryFile(parent, ".json").getAbsolutePath());
 createConfigForTest(createTemporaryFile(child, ".json").getAbsolutePath());
 createConfigForTest(createTemporaryFile(grand, ".json").getAbsolutePath());
 assertEquals("foo", config.getMap("default", "features").get("osapi"));
 assertNull(config.getProperty("child", "features"));
 assertNull(config.getProperty("grand", "features"));
}

@Test
public void nullEntryEvaluation() throws Exception {
 // We use a JSON Object here to guarantee that we're well formed up front.
 JSONObject json = new JSONObject("{ 'gadgets.container' : ['default'], features : { osapi : null }}");
 createConfigForTest(createTemporaryFile(json, ".json").getAbsolutePath());
 assertNull(config.getMap("default", "features").get("osapi"));
}

protected ELContext createExpressionContext(String container) {
 return getExpressions().newELContext(new ContainerConfigELResolver(this, container));
}

@Test
public void testCommonEnvironmentAddedToAllContainers() throws Exception {
 // We use a JSON Object here to guarantee that we're well formed up front.
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{DEFAULT_CONTAINER, "testContainer"});
 json.put("port", "${SERVER_PORT}");
 json.put("host", "${SERVER_HOST}");
 createConfigForTest(createTemporaryFile(json, ".json").getAbsolutePath());
 assertEquals("8080", config.getString(DEFAULT_CONTAINER, "port"));
 assertEquals("8080", config.getString("testContainer", "port"));
 assertEquals("localhost", config.getString(DEFAULT_CONTAINER, "host"));
 assertEquals("localhost", config.getString("testContainer", "host"));
}

@Test
public void parseBasicConfig() throws Exception {
 createConfigForTest(createDefaultContainer().getAbsolutePath());
 assertEquals(1, config.getContainers().size());
 for (String container : config.getContainers()) {
  assertEquals(DEFAULT_CONTAINER, container);
 }
 String value = config.getString(DEFAULT_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nested = config.getMap(DEFAULT_CONTAINER, NESTED_KEY);
 String nestedValue = nested.get(NESTED_NAME).toString();
 assertEquals(NESTED_VALUE, nestedValue);
}

@Test
public void parseWithDefaultInheritance() throws Exception {
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{CHILD_CONTAINER});
 json.put(PARENT_KEY, DEFAULT_CONTAINER);
 json.put(ARRAY_NAME, ARRAY_ALT_VALUE);
 // small nested data.
 JSONObject nested = new JSONObject();
 nested.put(NESTED_NAME, NESTED_ALT_VALUE);
 json.put(NESTED_KEY, nested);
 File childFile = createTemporaryFile(json, ".json");
 File parentFile = createDefaultContainer();
 createConfigForTest(childFile.getAbsolutePath() +
   JsonContainerConfigLoader.FILE_SEPARATOR + parentFile.getAbsolutePath());
 String value = config.getString(CHILD_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nestedObj = config.getMap(CHILD_CONTAINER, NESTED_KEY);
 String nestedValue = nestedObj.get(NESTED_NAME).toString();
 assertEquals(NESTED_ALT_VALUE, nestedValue);
 String arrayValue = config.getString(CHILD_CONTAINER, ARRAY_NAME);
 assertEquals(ARRAY_ALT_VALUE, arrayValue);
 // Verify that the parent value wasn't overwritten as well.
 List<String> actual = new ArrayList<String>();
 for (Object val : config.getList(DEFAULT_CONTAINER, ARRAY_NAME)) {
  actual.add(val.toString());
 }
 List<String> expected = Arrays.asList(ARRAY_VALUE);
 assertEquals(expected, actual);
}

@Before
public void setUp() {
 config = new ExpressionContainerConfig(Expressions.forTesting());
}

@Test
public void testNullEntriesOverrideEntriesInParent() throws Exception {
 // We use JSON Objects here to guarantee that we're well formed up front.
 JSONObject parent = new JSONObject("{ 'gadgets.container' : ['default'], features : { osapi : 'foo' }}");
 JSONObject child = new JSONObject("{ 'gadgets.container' : ['child'], features : null}");
 JSONObject grand = new JSONObject("{ 'gadgets.container' : ['grand'], parent : 'child'}");
 createConfigForTest(createTemporaryFile(parent, ".json").getAbsolutePath());
 createConfigForTest(createTemporaryFile(child, ".json").getAbsolutePath());
 createConfigForTest(createTemporaryFile(grand, ".json").getAbsolutePath());
 assertEquals("foo", config.getMap("default", "features").get("osapi"));
 assertNull(config.getProperty("child", "features"));
 assertNull(config.getProperty("grand", "features"));
}

@Test
public void nullEntryEvaluation() throws Exception {
 // We use a JSON Object here to guarantee that we're well formed up front.
 JSONObject json = new JSONObject("{ 'gadgets.container' : ['default'], features : { osapi : null }}");
 createConfigForTest(createTemporaryFile(json, ".json").getAbsolutePath());
 assertNull(config.getMap("default", "features").get("osapi"));
}

protected ELContext createExpressionContext(String container) {
 return getExpressions().newELContext(new ContainerConfigELResolver(this, container));
}

@Test
public void testCommonEnvironmentAddedToAllContainers() throws Exception {
 // We use a JSON Object here to guarantee that we're well formed up front.
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{DEFAULT_CONTAINER, "testContainer"});
 json.put("port", "${SERVER_PORT}");
 json.put("host", "${SERVER_HOST}");
 createConfigForTest(createTemporaryFile(json, ".json").getAbsolutePath());
 assertEquals("8080", config.getString(DEFAULT_CONTAINER, "port"));
 assertEquals("8080", config.getString("testContainer", "port"));
 assertEquals("localhost", config.getString(DEFAULT_CONTAINER, "host"));
 assertEquals("localhost", config.getString("testContainer", "host"));
}

@Override
protected BasicContainerConfig getTemporaryConfig(boolean copyValues) {
 ExpressionContainerConfig tmp = new ExpressionContainerConfig(getExpressions());
 if (copyValues) {
  tmp.rawConfig = deepCopyConfig(rawConfig);
  tmp.config = deepCopyConfig(config);
 }
 return tmp;
}

@Test
public void parseBasicConfig() throws Exception {
 createConfigForTest(createDefaultContainer().getAbsolutePath());
 assertEquals(1, config.getContainers().size());
 for (String container : config.getContainers()) {
  assertEquals(DEFAULT_CONTAINER, container);
 }
 String value = config.getString(DEFAULT_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nested = config.getMap(DEFAULT_CONTAINER, NESTED_KEY);
 String nestedValue = nested.get(NESTED_NAME).toString();
 assertEquals(NESTED_VALUE, nestedValue);
}

@Test
public void parseWithDefaultInheritance() throws Exception {
 JSONObject json = new JSONObject();
 json.put(CONTAINER_KEY, new String[]{CHILD_CONTAINER});
 json.put(PARENT_KEY, DEFAULT_CONTAINER);
 json.put(ARRAY_NAME, ARRAY_ALT_VALUE);
 // small nested data.
 JSONObject nested = new JSONObject();
 nested.put(NESTED_NAME, NESTED_ALT_VALUE);
 json.put(NESTED_KEY, nested);
 File childFile = createTemporaryFile(json, ".json");
 File parentFile = createDefaultContainer();
 createConfigForTest(childFile.getAbsolutePath() +
   JsonContainerConfigLoader.FILE_SEPARATOR + parentFile.getAbsolutePath());
 String value = config.getString(CHILD_CONTAINER, TOP_LEVEL_NAME);
 assertEquals(TOP_LEVEL_VALUE, value);
 Map<String, Object> nestedObj = config.getMap(CHILD_CONTAINER, NESTED_KEY);
 String nestedValue = nestedObj.get(NESTED_NAME).toString();
 assertEquals(NESTED_ALT_VALUE, nestedValue);
 String arrayValue = config.getString(CHILD_CONTAINER, ARRAY_NAME);
 assertEquals(ARRAY_ALT_VALUE, arrayValue);
 // Verify that the parent value wasn't overwritten as well.
 List<String> actual = new ArrayList<String>();
 for (Object val : config.getList(DEFAULT_CONTAINER, ARRAY_NAME)) {
  actual.add(val.toString());
 }
 List<String> expected = Arrays.asList(ARRAY_VALUE);
 assertEquals(expected, actual);
}

Javadoc

Represents a container configuration that uses expressions in values. We use a cascading model, so you only have to specify attributes in your config that you actually want to change. String values may use expressions. The variable context defaults to the 'current' container, but parent values may be accessed through the special "parent" property. get* can take either a simple property name (foo), or an EL expression (${foo.bar}).

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How to useExpressionContainerConfig in org.apache.shindig.config

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How to use
ExpressionContainerConfig
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org.apache.shindig.config