Chapter 93. ElSQL Component

elsqlName

Required The name of the elsql to use (is NAMED in the elsql file)

String

resourceUri

The resource file which contains the elsql SQL statements to use. You can specify multiple resources separated by comma. The resources are loaded on the classpath by default, you can prefix with file: to load from file system. Notice you can set this option on the component and then you do not have to configure this on the endpoint.

String

allowNamedParameters (common)

Whether to allow using named parameters in the queries.

true

boolean

databaseVendor (common)

To use a vendor specific com.opengamma.elsql.ElSqlConfig

ElSqlDatabaseVendor

dataSource (common)

Sets the DataSource to use to communicate with the database.

DataSource

dataSourceRef (common)

Deprecated Sets the reference to a DataSource to lookup from the registry, to use for communicating with the database.

String

outputClass (common)

Specify the full package and class name to use as conversion when outputType=SelectOne.

String

outputHeader (common)

Store the query result in a header instead of the message body. By default, outputHeader == null and the query result is stored in the message body, any existing content in the message body is discarded. If outputHeader is set, the value is used as the name of the header to store the query result and the original message body is preserved.

String

outputType (common)

Make the output of consumer or producer to SelectList as List of Map, or SelectOne as single Java object in the following way:a) If the query has only single column, then that JDBC Column object is returned. (such as SELECT COUNT( ) FROM PROJECT will return a Long object.b) If the query has more than one column, then it will return a Map of that result.c) If the outputClass is set, then it will convert the query result into an Java bean object by calling all the setters that match the column names.It will assume your class has a default constructor to create instance with.d) If the query resulted in more than one rows, it throws an non-unique result exception.StreamList streams the result of the query using an Iterator. This can be used with the Splitter EIP in streaming mode to process the ResultSet in streaming fashion.

SelectList

SqlOutputType

separator (common)

The separator to use when parameter values is taken from message body (if the body is a String type), to be inserted at placeholders.Notice if you use named parameters, then a Map type is used instead. The default value is comma

,

char

breakBatchOnConsumeFail (consumer)

Sets whether to break batch if onConsume failed.

false

boolean

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

expectedUpdateCount (consumer)

Sets an expected update count to validate when using onConsume.

-1

int

maxMessagesPerPoll (consumer)

Sets the maximum number of messages to poll

int

onConsume (consumer)

After processing each row then this query can be executed, if the Exchange was processed successfully, for example to mark the row as processed. The query can have parameter.

String

onConsumeBatchComplete (consumer)

After processing the entire batch, this query can be executed to bulk update rows etc. The query cannot have parameters.

String

onConsumeFailed (consumer)

After processing each row then this query can be executed, if the Exchange failed, for example to mark the row as failed. The query can have parameter.

String

routeEmptyResultSet (consumer)

Sets whether empty resultset should be allowed to be sent to the next hop. Defaults to false. So the empty resultset will be filtered out.

false

boolean

sendEmptyMessageWhenIdle (consumer)

If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead.

false

boolean

transacted (consumer)

Enables or disables transaction. If enabled then if processing an exchange failed then the consumerbreak out processing any further exchanges to cause a rollback eager.

false

boolean

useIterator (consumer)

Sets how resultset should be delivered to route. Indicates delivery as either a list or individual object. defaults to true.

true

boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this options is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

pollStrategy (consumer)

A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.

PollingConsumerPoll Strategy

processingStrategy (consumer)

Allows to plugin to use a custom org.apache.camel.component.sql.SqlProcessingStrategy to execute queries when the consumer has processed the rows/batch.

SqlProcessingStrategy

batch (producer)

Enables or disables batch mode

false

boolean

noop (producer)

If set, will ignore the results of the SQL query and use the existing IN message as the OUT message for the continuation of processing

false

boolean

useMessageBodyForSql (producer)

Whether to use the message body as the SQL and then headers for parameters. If this option is enabled then the SQL in the uri is not used.

false

boolean

alwaysPopulateStatement (producer)

If enabled then the populateStatement method from org.apache.camel.component.sql.SqlPrepareStatementStrategy is always invoked, also if there is no expected parameters to be prepared. When this is false then the populateStatement is only invoked if there is 1 or more expected parameters to be set; for example this avoids reading the message body/headers for SQL queries with no parameters.

false

boolean

parametersCount (producer)

If set greater than zero, then Camel will use this count value of parameters to replace instead of querying via JDBC metadata API. This is useful if the JDBC vendor could not return correct parameters count, then user may override instead.

int

elSqlConfig (advanced)

To use a specific configured ElSqlConfig. It may be better to use the databaseVendor option instead.

ElSqlConfig

placeholder (advanced)

Specifies a character that will be replaced to in SQL query. Notice, that it is simple String.replaceAll() operation and no SQL parsing is involved (quoted strings will also change).

#

String

prepareStatementStrategy (advanced)

Allows to plugin to use a custom org.apache.camel.component.sql.SqlPrepareStatementStrategy to control preparation of the query and prepared statement.

SqlPrepareStatement Strategy

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

templateOptions (advanced)

Configures the Spring JdbcTemplate with the key/values from the Map

Map

usePlaceholder (advanced)

Sets whether to use placeholder and replace all placeholder characters with sign in the SQL queries.

true

boolean

backoffErrorThreshold (scheduler)

The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.

int

backoffIdleThreshold (scheduler)

The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

int

backoffMultiplier (scheduler)

To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

int

delay (scheduler)

Milliseconds before the next poll. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

500

long

greedy (scheduler)

If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages.

false

boolean

initialDelay (scheduler)

Milliseconds before the first poll starts. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

1000

long

runLoggingLevel (scheduler)

The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

TRACE

LoggingLevel

scheduledExecutorService (scheduler)

Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool.

ScheduledExecutor Service

scheduler (scheduler)

To use a cron scheduler from either camel-spring or camel-quartz2 component

none

ScheduledPollConsumer Scheduler

schedulerProperties (scheduler)

To configure additional properties when using a custom scheduler or any of the Quartz2, Spring based scheduler.

Map

startScheduler (scheduler)

Whether the scheduler should be auto started.

true

boolean

timeUnit (scheduler)

Time unit for initialDelay and delay options.

MILLISECONDS

TimeUnit

useFixedDelay (scheduler)

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details.

true

boolean