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If Spring Security is on the classpath and no other WebSecurityConfigurerAdapter is present, the actuators are secured by Spring Boot auto-config. If you define a custom WebSecurityConfigurerAdapter , Spring Boot auto-config will back off and you will be in full control of actuator access rules.

28.4.1Cross Site Request Forgery Protection

Since Spring Boot relies on Spring Security’s defaults, CSRF protection is turned on by default. This means that the actuator endpoints that require a POST (shutdown and loggers endpoints), PUT or DELETE will get a 403 forbidden error when the default security configuration is in use.

Additional information about CSRF protection can be found in the Spring Security Reference Guide .

29.Working with SQL Databases

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provides extensive support for working with SQL databases, from direct JDBC access using JdbcTemplate to complete “object relational mapping” technologies such as Hibernate. Spring Data provides an additional level of functionality: creating Repository implementations directly from interfaces and using conventions to generate queries from your method names.

29.1Configure a DataSource

Java’s javax.sql.DataSource interface provides a standard method of working with database connections. Traditionally, a 'DataSource' uses a URL along with some credentials to establish a database connection.

29.1.1Embedded Database Support

It is often convenient to develop applications by using an in-memory embedded database. Obviously, in-memory databases do not provide persistent storage. You need to populate your database when your application starts and be prepared to throw away data when your application ends.

Spring Boot can auto-configure embedded , , and Derby databases. You need not provide any connection URLs. You need only include a build dependency to the embedded database that you want to use.

For example, the typical POM dependencies would be as follows:

29.1.2Connection to a Production Database

Production database connections can also be auto-configured by using a pooling DataSource . Spring Boot uses the following algorithm for choosing a specific implementation:

If you use the spring-boot-starter-jdbc or spring-boot-starter-data-jpa “starters”, you automatically get a dependency to HikariCP .

DataSource configuration is controlled by external configuration properties in spring.datasource.* . For example, you might declare the following section in :

See DataSourceProperties for more of the supported options. These are the standard options that work regardless of the actual implementation. It is also possible to fine-tune implementation-specific settings by using their respective prefix ( spring.datasource.hikari.* , spring.datasource.tomcat.* , and spring.datasource.dbcp2.* ). Refer to the documentation of the connection pool implementation you are using for more details.

For example, this expression:

becomes this lw (assuming the above expression appears as the first thing in the file):

If there is some whitespace in the sequence, like this one:

then there is no lw that corresponds to that whitespace; instead there is a logical gap between the lws.

In general, identifiers are represented with symbols and parenthesis are represented with strings and pict s can be inserted to render arbitrary pictures.

The line, line-span, column, and column-span correspond to the logical spacing for the redex program, not the actual spacing that will be used when they are rendered. The logical spacing is only used when determining where to place typeset portions of the program. In the absence of any rewriters, these numbers correspond to the line and column numbers in the original program.

The line and column are absolute numbers from the beginning of the file containing the expression. The column number is not necessarily the column of the open parenthesis in a sequence – it is the leftmost column that is occupied by anything in the sequence. The line-span is the number of lines, and the column span is the number of columns on the last line (not the total width).

When there are multiple lines, lines are aligned based on the logical space (i.e., the line/column line-span/column-span) fields of the lws. As an example, if this is the original pattern:

then the leftmost edges of the words "good" and "deserve" will be lined up underneath each other, but the relative positions of "boys" and "fudge" will be determined by the natural size of the words as they rendered in the appropriate font.

When ' spring appears in the list in the e field of a lw struct, then it absorbs all of the space around it. It is also used by Gingham Bardot Crop Top Print Miss Selfridge Good Selling Online Discount Pre Order 2018 Cheap Online m1Gk61nb
when constructing the picts for unquoted strings. For example, this expression

corresponds to these structs:

and the ' spring causes there to be no space between the empty string and the x in the typeset output.

A procedure variant of to-lw ; it accepts a syntax object and returns the corresponding lw structs. It only uses the location information in the syntax object, so metafunctions will not be rendered properly.
Produces a pict that corresponds to the lw object argument, using language/nts to determine which of the identifiers in the lw argument are non-terminals.

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. See also lw->pict .

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