How to use org.sonar.api.server.ws

 /**
  * Add 'selected=(selected|deselected|all)' for select-list oriented WS.
  */
 public NewAction addSelectionModeParam() {
  createParam(Param.SELECTED)
   .setDescription("Depending on the value, show only selected items (selected=selected), deselected items (selected=deselected), " +
    "or all items with their selection status (selected=all).")
   .setDefaultValue(SelectionMode.SELECTED.value())
   .setPossibleValues(SelectionMode.possibleValues());
  return this;
 }
}

@Override
public void define(WebService.NewController context) {
 WebService.NewAction action = context.createAction("upload")
  .setDescription("Upload a plugin.<br /> Requires 'Administer System' permission.")
  .setSince("6.0")
  .setPost(true)
  .setInternal(true)
  .setHandler(this);
 action.createParam(PARAM_FILE)
  .setDescription("The jar file of the plugin to install")
  .setRequired(true);
}

private static void defineGroupNameWsParameter(WebService.NewAction action) {
 action.createParam(PARAM_ORGANIZATION_KEY)
  .setDescription("Key of organization")
  .setExampleValue("my-org")
  .setInternal(true)
  .setSince("6.2");
 action.createParam(PARAM_GROUP_NAME)
  .setDescription("Group name")
  .setExampleValue("sonar-administrators");
}

public NewParam createPageParam() {
 return createParam(Param.PAGE)
  .setDescription(PAGE_PARAM_DESCRIPTION)
  .setExampleValue("42")
  .setDeprecatedKey("pageIndex", "5.2")
  .setDefaultValue("1");
}

@Test
public void param_with_maximum_value() {
 ((WebService) context -> {
  NewController newController = context.createController("api/custom_measures");
  NewAction create = newDefaultAction(newController, "create");
  create.createParam("numeric_value")
   .setMaximumValue(10);
  newController.done();
 }).define(context);
 WebService.Action action = context.controller("api/custom_measures").action("create");
 assertThat(action.param("numeric_value").maximumValue()).isEqualTo(10);
}

static void addProjectParam(NewAction action) {
 action
  .createParam(PARAM_PROJECT)
  .setDescription("Project key")
  .setExampleValue(KEY_PROJECT_EXAMPLE_001)
  .setRequired(true);
}

@Override
public void define(WebService.NewController context) {
 context.createAction(ACTION_SKIP_ONBOARDING_TUTORIAL)
  .setPost(true)
  .setInternal(true)
  .setDescription("Stores that the user has skipped the onboarding tutorial and does not want to see it after future logins.<br/>" +
   "Requires authentication.")
  .setSince("6.5")
  .setHandler(this);
}

public static void createGroupNameParameter(WebService.NewAction action) {
 action.createParam(PARAM_GROUP_NAME)
  .setDescription("Group name or 'anyone' (case insensitive)")
  .setExampleValue("sonar-administrators");
}

public WebService.NewParam createPermissionParameter(WebService.NewAction action) {
 return action.createParam(PARAM_PERMISSION)
  .setDescription(permissionParamDescription)
  .setRequired(true);
}

 private static void deprecateDeveloperParameter(NewAction action, String key) {
  action.createParam(key)
   .setDeprecatedSince("6.4")
   .setDescription("Deprecated parameter, used previously with the Developer Cockpit plugin. No measures are returned if parameter is set.");
 }
}

@Override
public void define(WebService.NewController context) {
 context.createAction("fake")
  .setHandler(this);
}

WebService.NewParam createOrganizationParam(NewAction action) {
 return action
  .createParam(PARAM_ORGANIZATION)
  .setDescription("Organization key. If no organization is provided, the default organization is used.")
  .setSince("7.0")
  .setRequired(false)
  .setInternal(false)
  .setExampleValue("my-org");
}

static void addPullRequestParam(NewAction action) {
 action
  .createParam(PARAM_PULL_REQUEST)
  .setDescription("Pull request id")
  .setExampleValue("1543")
  .setRequired(true);
}

@Override
public void define(WebService.NewController controller) {
 controller.createAction("resume")
  .setDescription("Resumes pause of Compute Engine workers. Requires the system administration permission or " +
   "system passcode (see " + SystemPasscodeImpl.PASSCODE_CONF_PROPERTY + " in sonar.properties).")
  .setSince("7.2")
  .setInternal(true)
  .setHandler(this)
  .setPost(true);
}

private static void createProjectKeyParameter(WebService.NewAction action) {
 action.createParam(PARAM_PROJECT_KEY)
  .setDescription("Project key")
  .setExampleValue(KEY_PROJECT_EXAMPLE_001);
}

 @Override
 public void define(WebService.NewController context) {
  context.createAction(actionKey).setHandler(this);
 }
};

static void addBranchParam(NewAction action) {
 action
  .createParam(PARAM_BRANCH)
  .setDescription("Name of the branch")
  .setExampleValue("branch1")
  .setRequired(true);
}

@Override
public void define(WebService.NewController controller) {
 controller.createAction(LOGOUT_ACTION)
  .setDescription("Logout a user.")
  .setSince("6.3")
  .setPost(true)
  .setHandler(ServletFilterHandler.INSTANCE);
}

public static void createTemplateProjectKeyPatternParameter(WebService.NewAction action) {
 action.createParam(PARAM_PROJECT_KEY_PATTERN)
  .setDescription("Project key pattern. Must be a valid Java regular expression")
  .setExampleValue(".*\\.finance\\..*");
}

private static void defineGroupIdWsParameter(WebService.NewAction action) {
 action.createParam(PARAM_GROUP_ID)
  .setDescription("Group id")
  .setExampleValue("42");
}