It is possible to group update scripts into subdirectories, however, the path to the script with the subdirectory should not break the chronological sequence. For example, subdirectories can be created by using year, or by year and month. On Microsoft SQL Server, providing a connection property is not enough, you have to link the schema with the database user. Below is an example of creating a new database and using a non-default schema in it.
In other respects, BaseIntIdentityIdEntity is similar to BaseIdentityIdEntity. The figure demonstrates the contents of several directories of the Tomcat server with the deployed application. The most code examples in this manual are based on the data model used in Sales Application. This manual provides the reference information for the CUBA platform and covers the most important topics of developing business applications with it. To get a discount enterprohoster promo code when buying a logo.
Integration of QUIC into the platform
@MetaClass annotation should be used to specify the entity name. All materials presented on the open part of this information resource are posted with a delay of at least 15 minutes. 14 days of free access to all service tools.A single tool for SMM on VKontakte. The service helps managers and specialists in https://keyproxy.net/en effectively organizing work with communities. Promotional code prohoster gives a +10% bonus to the amount of replenishment of the account. The service combines tools for site analysis, competitor monitoring, position checking, keyword selection and grouping, backlink monitoring, automatic professional reporting, and more.
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- If used, the CurrencyField is generated by Studio for this attribute in a Form of the entity editor screen.
- The negative impact of soft deletion is increase in database size and likely need for additional cleanup procedures.
- Indicates that the attribute does not have any length restrictions.
- The proxy provides invocation of service bean methods using Spring HTTP Invoker mechanism.
Constraint groups enable applying only a subset of all defined constraints depending on the application logic. For example, you may want to force a user to enter a value for an entity attribute, but at the same time to have an ability to set this attribute to null by some internal mechanism. In order to do it, you should specify the groups attribute on the constraint annotation. Then the constraint will take effect only when the same group is passed to the validation mechanism. You can define constraints using annotations of the javax.validation.constraints package or custom annotations. The annotations can be set on an entity or POJO class declaration, field or getter, and on a middleware service method.
This pack consists of 4 files – one for Russian, one for French, one for American English (with US country code), and a default file. See Localization in CUBA applications guide to learn how localized messages within the CUBA application can be defined and used. Applications based on CUBA platform support messages localization, which means that all user interface elements can be displayed in the language, selected by user. To call from a static context, you can use the UuidProvider class, which also has an additional fromString() method that works faster than the standard UUID.fromString() method.
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If it’s true, programmatic changes to the components state (if any) will be lost. When the method is invoked automatically on screen opening, the value of this parameter is false. But when invoking the method in response of UI events, set it to true, otherwise the restrictions on components will be summed and not replaced. The security subsystem allows you to set up access to entity attributes according to user permissions. That is the framework can automatically make an attribute read-only or hidden depending on a set of roles assigned to the current user. But sometimes you may want to change the access to attributes dynamically depending also on the current state of the entity or its linked entities.
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A handler is a Spring bean implementing the UiExceptionHandler interface. Its handle() method should process the exception and return true, or immediately return false if this handler is not able to handle the passed exception. This behavior enables creating a “chain of responsibility” for handlers. Thus the session identifier created when the user logs into the system is used for user authentication during each Middleware invocation.
- By default, it is done once in 10 minutes, but you can set a desired interval in milliseconds using the cuba.deleteOldQueryResultsInterval application property of the core module.
- You can implement some of the interfaces Creatable, Versioned, etc. in your concrete entity class.
- Indicates that a field which is marked by this annotation contains currency value.
- See Initial Entity Values guide to learn how to use external initialization via ScreenBuilders.
- If a packet or ACK is lost, the sender retransmits after a timeout (RTO, retransmission timeout).
- It checks the availability of the user session for the current thread, and transforms and logs exceptions if the service is called from the client tier.
- Depending on the entity type, DataManager selects a registered data store represented by an implementation of the DataStore interface and delegates loading and saving entities to it.
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EntityChangedEvent is a Spring’s ApplicationEvent which is sent by the framework on the middle tier when an entity instance is saved to the database. The event can be handled both inside the transaction (using @EventListener) and after its completion (using @TransactionalEventListener). OnAfterInsert() is called after a record is inserted into database, but before transaction commit. ORM enables execution of SQL queries returning either the lists of individual fields or entity instances.
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- Then the constraint will take effect only when the same group is passed to the validation mechanism.
- Indicates that the relationship is a composition, which is a stronger variant of the association.
- Calendar will be shown in a monthly view when the date range is over than one week (seven days) long.
- Transaction listeners are designed to react on transaction lifecycle events.
- Each Cause object always contains an exception class name and its message.
The following diagram illustrates a possible structure of dependencies between standard and custom application components. We assume that the combination is due to the Cronet library switching back to TCP on a timeout, as it cannot distinguish between real UDP failures and bad network conditions. We are currently looking for a solution to this problem as we work on the subsequent implementation of QUIC.
The information about the causing exceptions is stored as a list of RemoteException.Cause objects. Each Cause object always contains an exception class name and its message. Moreover, if the exception class is “supported by client”, Cause stores the exception object as well. This enables passing information to the client in the exception fields. You can use Spring Framework Ordered interface and @Order annotation for event handlers ordering.
It is represented by a separate web application running on a Java servlet container. To determine how TCP worked in our applications, we monitored TCP packets using tcpdump for a week on combat traffic coming from the Indian edge servers. Additionally, we created an Android application that sends emulated traffic to a test server, imitating real traffic as much as possible. Smartphones with this application were distributed to several employees who collected logs over several days. The way the data is displayed in columns can be customized using parameterized declarative renderers.
2.6. Infrastructure Interfaces
Now you can update or re-create the database, and all tables will be created in the specified schema. If you perform some custom programmatic validation in a service, use CustomValidationException to inform clients about validation errors in the same format as the standard bean validation does. The framework allows you to customize the message displayed by an exception handler for a database constraint violation error. Unhandled exceptions thrown on the client tier or passed from Middleware, are passed to the special handlers mechanism of the Web Client block. You can replace existing beans using Spring Framework mechanisms, for instance by registering a new bean in Spring XML config of the core module. Metadata interface provides access to metadata session and view repository.
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The method accepts a parameter indicating whether the transaction was successfully committed and a collection of detached entities contained in the persistence context of the completed transaction. The default timeout can be defined using the cuba.defaultQueryTimeoutSec application property. A listener is a class implementing one or several interfaces from the com.haulmont.cuba.core.listener package. The listener will react to events corresponding to the implemented interfaces. CUBA Studio automatically maintains the set of attributes for cross-datastore references when you select an entity from a different data store as an association.
Users should be able to view and edit a year, and if a user enters just two digits, the application should transform it to a year between 2000 and 2100. Otherwise, the whole entered number should be accepted as a year. Datatype interface defines methods for converting values to and from strings (formatting and parsing). Each entity attribute, if it is not a reference, has a corresponding Datatype, which is used by the framework to format and parse the attribute value. The usage of JPA cascade and orphanRemoval annotation attributes is not recommended.
3.1. Connecting to Databases
- If authentication on behalf of another user is required, pass the login of the desired user to the begin() method of the first variant.
- The web interface of the platform-based applications supports all popular browsers, including Google Chrome, Mozilla Firefox, Safari, Opera 15+, Internet Explorer 11, Microsoft Edge.
- When using a composite constraint, the resulting set of constraint violations will contain separate entries for each enclosed constraint.
- The cuba.additionalStores and cuba.persistenceConfig_db1 properties should also be specified in the property files of all used application blocks (web-app.properties, portal-app.properties, etc.).
- It stores recently read or written entity instance in memory, which minimizes database access and improves the application performance.
- The default timeout can be defined using the cuba.defaultQueryTimeoutSec application property.
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Websites may show extra security checks when they detect proxy traffic. Instead, you type those URLs into the proxy website’s search box. Think of the proxy as a middleman that visits the site for you.
You can adjust the dialog type using the cuba.gui.useSaveConfirmation application property. Mixins enable creating features that can be reused in multiple UI screens without the need to inherit your screens from common base classes. Mixins are implemented using Java interfaces with default methods. As you can see, when values are returned through a custom CloseAction, the caller doesn’t have to know the opened screen class because it doesn’t invoke methods of the concrete screen controller. Screen descriptor is an XML file containing declarative definition of visual components, data components and some screen parameters. AfterDetachEvent is sent after the screen is removed from the application UI when it is closed by the user or when the user logs out.
2.9. Application Properties
It makes sense if Middleware serves remote clients that theoretically can be hacked, like a desktop client. In this case, set also the cuba.keyForSecurityTokenEncryption application property to a unique value. If your application uses only Web or Portal clients, you can safely keep default values of these properties. Datatypes are registered in the DatatypeRegistry bean, which loads and initializes Datatype implementation classes from the metadata.xml files of the project and its application components.
According to the example the screen includes the description of customerDc data container for a Customer entity with active attribute. Use the value attribute to specify values and the ref attribute to specify identifiers of the screen components. InitEvent is sent when the screen controller and all its declaratively defined components are created, and dependency injection is completed. Some visual components are not fully initialized, for example buttons are not linked with actions.
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Therefore, if you create an exception instance on Middleware and want to pass it to the client, specify cause parameter only if you are sure that it contains the exceptions known to the client. AuthenticationManager and AuthenticationProvider can throw LoginException or one of its descendants from authenticate() and login() methods. Also, UnsupportedCredentialsException is thrown if passed credentials object cannot be processed by available AuthenticationProvider beans.
4.2. Data Stores
The entities persisted and merged implicitly using such declaration will bypass some system mechanisms. In particular, the EntityStates bean does not detect the managed state correctly and entity listeners are not invoked at all. The orphanRemoval annotation attribute does not respect the soft deletion mechanism. Makes the platform to ignore the user’s time zone (if it is set for the current session) for an attribute of the timestamp type (annotated with @javax.persistence.Temporal.TIMESTAMP). The annotated method will be invoked right after the entity instance is created by the Metadata.create() method or similar DataManager.create() and DataContext.create() methods. Defines how to create a string which represents a single instance of the entity.
When the timeout is exceeded, the transaction is interrupted and rolled back. Transaction timeout effectively limits the maximum duration of a database request. Programmatic transaction management is done using the com.haulmont.cuba.core.Transaction interface. A reference to it can be obtained via the createTransaction() or getTransaction() methods of the Persistence infrastructure interface.
1.1. Application Tiers and Blocks
Use cacheable queries only if entity cache is enabled for the returned entity. Otherwise on every query entity instances will be fetched from the database by their identifiers one by one. It stores recently read or written entity instance in memory, which minimizes database access and improves the application performance. AfterComplete() method is called after transaction is completed.
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This section describes some access control aspects from the developer’s point of view. For complete information on configuring user data access restrictions, see Security Subsystem. They can only be obtained through explicit interface injection or via Configuration.getConfig() but not through AppBeans.get().
The execution of scripts essentially comes down to running a special Gradle task defined in the build.gradle build script. It can be done from the command line or via the Studio interface. The platform contains a special unchecked exception class SilentException. It can be used to interrupt execution without showing any messages to the user or writing them to the log.
Such statement is actually transformed to SQL which deletes all instances not marked for deletion. This confusing behavior is disabled by default and can be enabled using the cuba.enableDeleteStatementInSoftDeleteMode application property. The type of the DBMS used in the application is defined by the cuba.dbmsType and (optionally) cuba.dbmsVersion application properties.
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Of course, application components can be reusable and provide a domain-specific layer of abstraction on top of the framework. A screen fragment can have its own data containers and loaders, defined in the data XML element. At the same time, the framework creates a single instance of DataContext for the screen and all its fragments.