At https://docs.spring.io/spring-integration/reference/html/dsl.html#java-dsl-flow-adapter I find this code example:
#Component
public class MyFlowAdapter extends IntegrationFlowAdapter {
private final AtomicBoolean invoked = new AtomicBoolean();
public Date nextExecutionTime(TriggerContext triggerContext) {
return this.invoked.getAndSet(true) ? null : new Date();
}
#Override
protected IntegrationFlowDefinition<?> buildFlow() {
return from(this::messageSource,
e -> e.poller(p -> p.trigger(this::nextExecutionTime)))
.split(this)
.transform(this)
.aggregate(a -> a.processor(this, null), null)
.enrichHeaders(Collections.singletonMap("thing1", "THING1"))
.filter(this)
.handle(this)
.channel(c -> c.queue("myFlowAdapterOutput"));
}
public String messageSource() {
return "T,H,I,N,G,2";
}
#Splitter
public String[] split(String payload) {
return StringUtils.commaDelimitedListToStringArray(payload);
}
#Transformer
public String transform(String payload) {
return payload.toLowerCase();
}
#Aggregator
public String aggregate(List<String> payloads) {
return payloads.stream().collect(Collectors.joining());
}
#Filter
public boolean filter(#Header Optional<String> thing1) {
return thing1.isPresent();
}
#ServiceActivator
public String handle(String payload, #Header String thing1) {
return payload + ":" + thing1;
}
}
Besides the fact that this code doesn't seem to compile with the latest version of Spring Integration, can anyone provide a working example how how one would use this MyFlowAdapter?
Related
I’m working on upgrading our application vaadin version from 7.7.24 to 8.13.3. We’ve completed all the dependency issues and i’m able to start the application in locally.
We have a textbox that is showing up the Event data.
Here is the class file that i'm using:
#Entity
#Table(name = "changelog")
public class ChangelogEvent extends BaseEntity
{
#Column(name = "remote_ip")
private String remoteIp;
#Column(name = "remote_host")
private String remoteHost;
#Column(name = "event")
#Enumerated(EnumType.ORDINAL)
private ChangelogEventType eventType;
#Column(name = "entity_type")
private String entityType;
public ChangelogEvent()
{
}
public ChangelogEvent(String remoteIp, String remoteHost, ChangelogEventType eventType)
{
this.remoteIp = remoteIp;
this.remoteHost = remoteHost;
this.eventType = eventType;
}
public String getRemoteIp()
{
return remoteIp;
}
public void setRemoteIp(String remoteIp)
{
this.remoteIp = remoteIp;
}
public ChangelogEventType getEventType()
{
return eventType;
}
public void setEventType(ChangelogEventType eventType)
{
this.eventType = eventType;
}
public String getRemoteHost()
{
return remoteHost;
}
public void setRemoteHost(String remoteHost)
{
this.remoteHost = remoteHost;
}
public String getEntityType()
{
return entityType;
}
public void setEntityType(String entityType)
{
this.entityType = entityType;
}
}
And here is my ChangelogEventType.java file that defined ChangelogEventType enum:
public enum ChangelogEventType
{
CREATED("Created"),
UPDATED("Updated"),
DELETED("Deleted"),
LOGIN("Login"),
LOGOUT("Logout"),
LOGIN_RETRY("Login Retry"),
ACCOUNT_LOCKED("Account Locked"),
PASSWORD_EXPIRED("Password Expired"),
PASSWORD_CHANGED("Password Changed");
private String text;
ChangelogEventType(String text)
{
this.text = text;
}
public String getText()
{
return text;
}
public static ChangelogEventType fromString(String text)
{
if (text != null)
{
for (ChangelogEventType event : ChangelogEventType.values())
{
if (text.equalsIgnoreCase(event.text))
{
return event;
}
}
}
return null;
}
}
Here is the code that i'm using for binding the values into textfield.
eventType = createTextField("Event", COLUMN_WIDTH);
binder.forField(eventType)
.withNullRepresentation("None")
.bind(ChangelogEvent::getEventType, ChangelogEvent::setEventType);
Is there any way to bind the Enum to textbox ?
You need to write custom converter and use it in Binder using withConverter method, in your case something like:
class StringToChangelogEventTypeConverter implements Converter<String, ChangelogEventType> {
#Override
public Result<ChangelogEventType> convertToModel(String fieldValue, ValueContext context) {
// Produces a converted value or an error
ChangelogEventType event = ChangelogEventType.fromString(fieldValue);
if (event != null) {
// ok is a static helper method that creates a Result
return Result.ok(ChangelogEventType.fromString(fieldValue));
} else {
// error is a static helper method that creates a Result
return Result.error("Please enter a number");
}
}
#Override
public String convertToPresentation(ChangelogEventType event, ValueContext context) {
// Converting to the field type should always succeed,
// so there is no support for returning an error Result.
return event.getText();
}
}
I have a AutoCompleteTextView that I give it 2 different adapters depending on the amount of text that is being present at the textview - if it has 0 characters I want it to display a list of "recently searched" strings adapter, while if it has more than 1 characters I want it to display auto completion list.
My getRecentlySearchedQueries method along with the RecentSearchedViewModel-
private List<String> recentlySearchedQueries = new ArrayList<>(); // pasted from the top of the class
#Override
public void getRecentlySearchedQueries() {
recentSearchViewModel.getAllQueries().observe(getActivity(), databaseRecentlySearchList -> {
if (databaseRecentlySearchList == null) {
return;
}
for (int i = 0; i < databaseRecentlySearchList.size(); i++) {
Log.d("localDBValue", "Added value - " + databaseRecentlySearchList.get(i).toString() + "\n");
String query = databaseRecentlySearchList.get(i).getQuery();
recentlySearchedQueries.add(query);
}
//Log.d("localDBValue", "recent search list value - " + recentlySearchedQueries);
});
}
public class RecentSearchViewModel extends AndroidViewModel {
private RecentSearchRepository recentSearchRepository;
private LiveData<List<RecentSearchModel>> allRecentlySearched;
public RecentSearchViewModel(#NonNull Application application) {
super(application);
recentSearchRepository = new RecentSearchRepository(application);
allRecentlySearched = recentSearchRepository.getAllRecentSearches();
}
public void insert(RecentSearchModel model) {
recentSearchRepository.insert(model);
}
public void update(RecentSearchModel model) {
// add implementation in the future if needed
}
public void delete(RecentSearchModel model) {
// add implementation in the future if needed
}
public LiveData<List<RecentSearchModel>> getAllQueries() {
return allRecentlySearched;
}
}
public class RecentSearchRepository {
private RecentSearchDao recentSearchDao;
private LiveData<List<RecentSearchModel>> allRecentSearches;
public RecentSearchRepository(Application application) {
MarketplaceDatabase database = MarketplaceDatabase.getRecentSearchInstance(application);
recentSearchDao = database.recentSearchDao();
allRecentSearches = recentSearchDao.getRecentSearchList();
}
public void insert(RecentSearchModel model) {
new RecentSearchRepository.InsertRecentSearchAsyncTask(recentSearchDao).execute(model);
}
public void update (RecentSearchModel model) {
//TODO - implement in future if needed
}
public void delete(RecentSearchModel model) {
//TODO - implement in future if needed
}
public LiveData<List<RecentSearchModel>> getAllRecentSearches() {
return allRecentSearches;
}
private static class InsertRecentSearchAsyncTask extends AsyncTask<RecentSearchModel, Void, Void> {
private RecentSearchDao recentSearchDao;
public InsertRecentSearchAsyncTask(RecentSearchDao recentSearchDao) {
this.recentSearchDao = recentSearchDao;
}
#Override
protected Void doInBackground(RecentSearchModel... recentSearchModels) {
recentSearchDao.insert(recentSearchModels[0]);
return null;
}
}
private static class UpdateRecentSearchAsyncTask extends AsyncTask<RecentSearchModel, Void, Void> {
private RecentSearchDao recentSearchDao;
public UpdateRecentSearchAsyncTask(RecentSearchDao recentSearchDao) {
this.recentSearchDao = recentSearchDao;
}
#Override
protected Void doInBackground(RecentSearchModel... recentSearchModels) {
recentSearchDao.update(recentSearchModels[0]);
return null;
}
}
}
#Dao
public interface RecentSearchDao {
#Insert()
void insert(RecentSearchModel model);
#Update
void update(RecentSearchModel model);
#Delete
void delete(RecentSearchModel model);
#Query("select * from recent_search_table")
LiveData<List<RecentSearchModel>> getRecentSearchList();
}
#Entity(tableName = "recent_search_table")
public class RecentSearchModel {
#PrimaryKey(autoGenerate = true)
private int ID;
private String query;
public RecentSearchModel(){
}
public RecentSearchModel(String query) {
this.query = query;
}
public void setID(int ID) {
this.ID = ID;
}
public int getID() {
return ID;
}
public String getQuery() {
return query;
}
public void setQuery(String query) {
this.query = query;
}
#Override
public String toString() {
return "RecentSearchModel{" +
"query='" + query + '\'' +
'}';
}
#Override
public boolean equals(#Nullable Object obj) {
if (obj instanceof RecentSearchModel)
return this.query.equalsIgnoreCase(((RecentSearchModel) obj).query);
return false;
}
}
So, what I am doing here is for start getting all values inside my local DB and adding them to my String list that is part of the adapter. So far so good.
The issue I am facing is that the adapter won't show the amount of strings available in the list that populates it. In fact, it sometimes shows a view half-cut with wierd information, sometimes does not show anything and sometimes shows part of the corrent information. What am I missing?
Another thing I am facing is that the "recently searched" adapter won't work when clicking on the AutoCompleteTextView - it only works when typing and deleting values so the char length is 0. How can I make it work from start of focus?
Here is the way I am populating the information to the ViewModel -
/**
* Shows the searched products following
*/
#Override
public void getSearchedProducts(String searchedQuery) {
MarketplaceUtils.getSearchedProducts(searchedQuery, marketApiCalls, false, initialSearchTake, initialMarketplacePage, new MarketplaceUtils.OnProductsFetchCompleteListener() {
#Override
public void onSuccess(List<MiniProductModel> list) {
if (!searchedQuery.equals(currentSearchedText))
return;
if (list == null) {
//reaching here means we do not have a result to show to the UI so we empty the list.
currentProductList.clear();
productsAdapter.notifyDataSetChanged();
return;
}
if (searchedQuery.length() > 3 && searchAutoCompleteStrings.contains(searchedQuery)) {
Log.d("localDBValue", "searchedValue - " + searchedQuery);
recentSearchViewModel.insert(new RecentSearchModel(searchedQuery));
}
mPresenter.setDiscoverProductsLayoutVisibility(View.GONE);
currentProductList.clear();
currentProductList.addAll(list);
productsAdapter.notifyDataSetChanged();
}
#Override
public void onError(Throwable throwable) {
Log.d("searchedProducts", throwable.getMessage());
}
});
}
The default behaviour for #Insert method of Room is OnConflictStrategy.ABORT - so what I did is to implement equals() method to verify that the RecentSearchModels that are being compared are compared by their string value. Still does seems to effect anything.
Im trying to write validation in Vaadin but I don't understand how to check if date field is empty
I wrote something like this
#Override
public void setConfiguration(EditorConfiguration editorConfiguration) {
boolean required = ((DateFieldConfiguration) editorConfiguration).isRequired();
if (required == true) {
setRequiredIndicatorVisible(true);
addValueChangeListener(event -> validate(event.getSource().getDefaultValidator(), event.getValue()));
}
}
private void validate(Validator<LocalDate> defaultValidator, LocalDate localDate) {
binder.forField(this).withValidator(validator).asRequired("Mandatory").bind(s -> getValue(),
(b, v) -> setValue(v));
}
I have achived a validation with a text field:
String Validator code
public class VaadinStringEditor extends TextField implements HasValueComponent<String> {
/**
*
*/
private static final long serialVersionUID = 6271513226609012483L;
private Binder<String> binder;
#PostConstruct
public void init() {
setWidth("100%");
binder = new Binder<>();
}
#Override
public void initDefaults() {
setValue("");
binder.validate();
}
#Override
public void setConfiguration(EditorConfiguration editorConfiguration) {
Validator<String> validator = ((TextFieldConfiguration) editorConfiguration).getValidator();
if (validator != null) {
binder.forField(this).withValidator(validator).asRequired("Mandatory").bind(s -> getValue(),
(b, v) -> setValue(v));
}
and I valid it here:
question.setEditorConfiguration(new TextFieldConfiguration(textRequiredValidator()));
Validator:
private Validator<String> textRequiredValidator() {
return Validator.from(v -> v != null && StringUtils.trimAllWhitespace((String) v).length() != 0,
, "Not empty");
}
You should use com.vaadin.ui.DateField for LocalDate values. Have a look at the following example.
Example bean:
public class MyBean {
private LocalDate created;
public LocalDate getCreated() {
return created;
}
public void setCreated(LocalDate created) {
this.created = created;
}
}
Editor
DateField dateField = new DateField("Date selector");
binder.forField(dateField)
.bind(MyBean::getCreated, MyBean::setCreated);
If for some reason you would like to have com.vaadin.ui.TextField for editing date, then you need to set converter like this:
Binder<MyBean> binder = new Binder<>();
TextField textDateField = new TextField("Date here:");
binder.forField(textDateField)
.withNullRepresentation("")
.withConverter(new StringToLocalDateConverter())
.bind(MyBean::getCreated, MyBean::setCreated);
Converter implementation:
public class StringToLocalDateConverter implements Converter<String, LocalDate> {
#Override
public Result<LocalDate> convertToModel(String userInput, ValueContext valueContext) {
try {
return Result.ok(LocalDate.parse(userInput));
} catch (RuntimeException e) {
return Result.error("Invalid value");
}
}
#Override
public String convertToPresentation(LocalDate value, ValueContext valueContext) {
return Objects.toString(value, "");
}
}
Note that this converter does not utilise ValueContext object that contains information that should be taken into account in more complex cases. For example, user locale should be handled.
i'm using spring-boot-starter-data-elasticsearch (1.4.0.M3).
I'm unable to get the version (_version in elasticsearch query result) of a document using the annoation "version".
Any idea why the annotation isn't working ?
f.e.:
#GwtCompatible
#Document(indexName = "myIndexName")
public class Catalog implements Serializable {
private List<GroupProduct> groups;
#Id
private String uuid;
#Version
private Long version;
#Field(type = FieldType.Nested)
private List<Product> products;
private String label;
#NotEmpty
private String organizationUuid;
private List<String> organizationUnitUuids;
private Date updateDate;
private List<VAT> vats;
public Catalog() {
}
public List<GroupProduct> getGroups() {
return groups;
}
public List<Product> getProducts() {
return products;
}
public Date getUpdateDate() {
return updateDate;
}
public void setGroups(List<GroupProduct> groups) {
this.groups = groups;
}
public void setProducts(List<Product> products) {
this.products = products;
}
public void setUpdateDate(Date updateDate) {
this.updateDate = updateDate;
}
public List<VAT> getVats() {
return vats;
}
public void setVats(List<VAT> vats) {
this.vats = vats;
}
public String getUuid() {
return uuid;
}
public void setUuid(String uuid) {
this.uuid = uuid;
}
public String getOrganizationUuid() {
return organizationUuid;
}
public void setOrganizationUuid(String organizationUuid) {
this.organizationUuid = organizationUuid;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public List<String> getOrganizationUnitUuids() {
return organizationUnitUuids;
}
public void setOrganizationUnitUuids(List<String> organizationUnitUuids) {
this.organizationUnitUuids = organizationUnitUuids;
}
public Long getVersion() {
return version;
}
public void setVersion(Long version) {
this.version = version;
}
}
Spring Data Elasticsearch (as of version 2.0.2) seems to have only partial support for the #Version annotation. If you annotate a document with a version field, it will be used when indexing a document. It will tell Elasticsearch that the document being saved is that specified version. If the new version is less than or equal to the version of the current document, Elasticsearch will throw a VersionConflictEngineException.
Unfortunately, Spring does not appear to populate this version field when a document is retrieved. As far as I can tell, this makes the version annotation useless. Perhaps the project will add this support in the near future. In the meantime, I have found a workaround by extending the default ResultMapper that Spring uses:
public class ExtendedResultMapper extends DefaultResultMapper {
protected MappingContext<? extends ElasticsearchPersistentEntity<?>, ElasticsearchPersistentProperty> mappingContext;
public ExtendedResultMapper(MappingContext<? extends ElasticsearchPersistentEntity<?>, ElasticsearchPersistentProperty> mappingContext) {
super(mappingContext);
this.mappingContext = mappingContext;
}
#Override
public <T> T mapResult(GetResponse response, Class<T> clazz) {
T result = super.mapResult(response, clazz);
if (result != null) {
setPersistentEntityVersion(result, response.getVersion(), clazz);
}
return result;
}
#Override
public <T> LinkedList<T> mapResults(MultiGetResponse responses, Class<T> clazz) {
LinkedList<T> results = super.mapResults(responses, clazz);
if (results != null) {
for (int i = 0; i < results.size(); i++) {
setPersistentEntityVersion(results.get(i), responses.getResponses()[i].getResponse().getVersion(), clazz);
}
}
return results;
}
private <T> void setPersistentEntityVersion(T result, Long version, Class<T> clazz) {
if (mappingContext != null && clazz.isAnnotationPresent(Document.class)) {
PersistentProperty<ElasticsearchPersistentProperty> versionProperty = mappingContext.getPersistentEntity(clazz).getVersionProperty();
if (versionProperty != null && versionProperty.getType().isAssignableFrom(Long.class)) {
Method setter = versionProperty.getSetter();
if (setter != null) {
try {
setter.invoke(result, version);
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
}
}
You can tell Spring to use this version instead of the default mapper as follows:
#Autowired
private Client client;
#Bean
public ElasticsearchTemplate elasticsearchTemplate() {
MappingElasticsearchConverter converter = new MappingElasticsearchConverter(new SimpleElasticsearchMappingContext());
ExtendedResultMapper mapper = new ExtendedResultMapper(converter.getMappingContext());
return new ElasticsearchTemplate(client, converter, mapper);
}
Note that the version is only populated for Get or Multi-Get requests. Search results do not include version information.
You could also use this same approach to extract other information from the GetResponse objects.
Using this code, if you get a document and then try to save it back, it will fail unless you increment the version.
I was trying to map ResultSet data to an object and returning it. Here is how i'm mapping data to an object. Now i'm having only 7 columns in resultset so this is working fine but what if i'm having 20 or 30 columns. How can i map dynamically those columns.
public class ProductsWrapperMapper implements ResultSetMapper<ProductsWrapper> {
public ProductsWrapper map(int i, ResultSet resultSet,
StatementContext statementContext) throws SQLException {
ProductsWrapper product = new ProductsWrapper();
if ((isColumnPresent(resultSet,"a_productid"))) {
product.setId(resultSet.getInt("a_productid"));
}
if ((isColumnPresent(resultSet,"a_productname"))) {
product.setProductName(resultSet.getString("a_productname"));
}
if ((isColumnPresent(resultSet,"a_productlink"))) {
product.setLink(resultSet.getString("a_productlink"));
}
if ((isColumnPresent(resultSet,"a_productimagelink"))) {
product.setImageLink(resultSet.getString("a_productimagelink"));
}
if ((isColumnPresent(resultSet,"a_websiteid"))) {
product.setWebsiteId(resultSet.getInt("a_websiteid"));
}
if ((isColumnPresent(resultSet,"a_productidentification"))) {
product.setProductIdentification(resultSet
.getString("a_productidentification"));
}
if ((isColumnPresent(resultSet,"a_adddate"))) {
product.setAddDate(resultSet.getString("a_adddate"));
}
return product;
}
public boolean isColumnPresent(ResultSet resultSet,String column) {
try {
#SuppressWarnings("unused")
int index = resultSet.findColumn(column);
return true;
} catch (SQLException e) {
// TODO Auto-generated catch block
return false;
}
}
}
Below one is my class which i was returning the object from mapper class above.
#JsonInclude(Include.NON_NULL)
public class ProductsWrapper {
private int id;
private String productName;
private String link;
private String imageLink;
private int websiteId;
private String productIdentification;
private String addDate;
int getWebsiteId() {
return websiteId;
}
public void setWebsiteId(int websiteId) {
this.websiteId = websiteId;
}
public String getProductIdentification() {
return productIdentification;
}
public void setProductIdentification(String productIdentification) {
this.productIdentification = productIdentification;
}
public String getAddDate() {
return addDate;
}
public void setAddDate(String addDate) {
this.addDate = addDate;
}`enter code here`
public ProductsWrapper(int id) {
this.setId(id);
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public String getImageLink() {
return imageLink;
}
public void setImageLink(String imageLink) {
this.imageLink = imageLink;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
You can also try Jdbi-folder. It automatically takes care of dynamic bynding and also it provides one to many mapping relationship.
You can add Rosetta as a mapper for your JDBI result sets (it also works for bindings). Have a look at the advanced features to map column names with underscores to snake snake case java names.
Beware that there is no warning message if Rosetta is unable to map a value: any missed property in the target bean will just be empty. I found that my database returned column names in capital letters, therefore the LowerCaseWithUnderscoresStrategy in the example didn't work for me. I created a UpperCaseWithUnderscoresStrategy.
To skip writing getters and setters in ProductsWrapper have a look at Lombok's #Data annotation.