AbstractQueryReport (Apache Tomcat 8.5.12 API Documentation)

org.apache.tomcat.jdbc.pool.interceptor

## Class AbstractQueryReport

- java.lang.Object
- - org.apache.tomcat.jdbc.pool.JdbcInterceptor
  - - org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor
    - - org.apache.tomcat.jdbc.pool.interceptor.AbstractQueryReport

- All Implemented Interfaces:
    InvocationHandler
  Direct Known Subclasses:
    ResetAbandonedTimer, SlowQueryReport

      public abstract class AbstractQueryReport
      extends AbstractCreateStatementInterceptor

  Abstract class that wraps statements and intercepts query executions.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected class` | `AbstractQueryReport.StatementProxy` Class to measure query execute time

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected static Constructor<?>[]` | `constructors` the constructors that are used to create statement proxies
    `protected long` | `threshold` The threshold in milliseconds.

    - ### Fields inherited from class org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor

      `CREATE_STATEMENT, CREATE_STATEMENT_IDX, EXECUTE, EXECUTE_BATCH, EXECUTE_QUERY, EXECUTE_TYPES, EXECUTE_UPDATE, PREPARE_CALL, PREPARE_CALL_IDX, PREPARE_STATEMENT, PREPARE_STATEMENT_IDX, STATEMENT_TYPE_COUNT, STATEMENT_TYPES`

    - ### Fields inherited from class org.apache.tomcat.jdbc.pool.JdbcInterceptor

      `CLOSE_VAL, EQUALS_VAL, GETCONNECTION_VAL, HASHCODE_VAL, ISCLOSED_VAL, ISVALID_VAL, ISWRAPPERFOR_VAL, properties, TOSTRING_VAL, UNWRAP_VAL`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractQueryReport()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `createStatement(Object proxy, Method method, Object[] args, Object statement, long time)` Creates a statement interceptor to monitor query response times
    `protected Constructor<?>` | `getConstructor(int idx, Class<?> clazz)` Creates a constructor for a proxy class, if one doesn't already exist
    `long` | `getThreshold()` returns the query measure threshold.
    `protected abstract void` | `prepareCall(String query, long time)` Invoked when prepareCall has been called and completed.
    `protected abstract void` | `prepareStatement(String sql, long time)` Invoked when prepareStatement has been called and completed.
    `protected String` | `reportFailedQuery(String query, Object[] args, String name, long start, Throwable t)` Invoked when a query execution, a call to execute/executeQuery or executeBatch failed.
    `protected String` | `reportQuery(String query, Object[] args, String name, long start, long delta)` Invoked when a query execution, a call to execute/executeQuery or executeBatch succeeded and was within the timing threshold
    `protected String` | `reportSlowQuery(String query, Object[] args, String name, long start, long delta)` Invoked when a query execution, a call to execute/executeQuery or executeBatch succeeded and was exceeded the timing threshold
    `void` | `setThreshold(long threshold)` Sets the query measurement threshold.

    - ### Methods inherited from class org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor

      `closeInvoked, invoke, isExecute, isStatement, process, reset`

    - ### Methods inherited from class org.apache.tomcat.jdbc.pool.JdbcInterceptor

      `compare, compare, disconnected, getNext, getProperties, isUseEquals, poolClosed, poolStarted, setNext, setProperties, setUseEquals`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### threshold

          protected long threshold

      The threshold in milliseconds. If the query is faster than this, we don't measure it

    - #### constructors

          protected static final Constructor<?>[] constructors

      the constructors that are used to create statement proxies

  - ### Constructor Detail

    - #### AbstractQueryReport

          public AbstractQueryReport()

  - ### Method Detail

    - #### prepareStatement

          protected abstract void prepareStatement(String sql,
                              long time)

      Invoked when prepareStatement has been called and completed.
      Parameters:
        `sql` - - the string used to prepare the statement with
        `time` - - the time it took to invoke prepare

    - #### prepareCall

          protected abstract void prepareCall(String query,
                         long time)

      Invoked when prepareCall has been called and completed.
      Parameters:
        `query` - - the string used to prepare the statement with
        `time` - - the time it took to invoke prepare

    - #### reportFailedQuery

          protected String reportFailedQuery(String query,
                                 Object[] args,
                                 String name,
                                 long start,
                                 Throwable t)

      Invoked when a query execution, a call to execute/executeQuery or executeBatch failed.
      Parameters:
        `query` - the query that was executed and failed
        `args` - the arguments to the execution
        `name` - the name of the method used to execute `AbstractCreateStatementInterceptor.isExecute(Method, boolean)`
        `start` - the time the query execution started
        `t` - the exception that happened
      Returns:
        - the SQL that was executed or the string "batch" if it was a batch execution

    - #### reportQuery

          protected String reportQuery(String query,
                           Object[] args,
                           String name,
                           long start,
                           long delta)

      Invoked when a query execution, a call to execute/executeQuery or executeBatch succeeded and was within the timing threshold
      Parameters:
        `query` - the query that was executed and failed
        `args` - the arguments to the execution
        `name` - the name of the method used to execute `AbstractCreateStatementInterceptor.isExecute(Method, boolean)`
        `start` - the time the query execution started
        `delta` - the time the execution took
      Returns:
        - the SQL that was executed or the string "batch" if it was a batch execution

    - #### reportSlowQuery

          protected String reportSlowQuery(String query,
                               Object[] args,
                               String name,
                               long start,
                               long delta)

      Invoked when a query execution, a call to execute/executeQuery or executeBatch succeeded and was exceeded the timing threshold
      Parameters:
        `query` - the query that was executed and failed
        `args` - the arguments to the execution
        `name` - the name of the method used to execute `AbstractCreateStatementInterceptor.isExecute(Method, boolean)`
        `start` - the time the query execution started
        `delta` - the time the execution took
      Returns:
        - the SQL that was executed or the string "batch" if it was a batch execution

    - #### getThreshold

          public long getThreshold()

      returns the query measure threshold. This value is in milliseconds. If the query is faster than this threshold than it wont be accounted for
      Returns:
        the threshold in milliseconds

    - #### setThreshold

          public void setThreshold(long threshold)

      Sets the query measurement threshold. The value is in milliseconds. If the query goes faster than this threshold it will not be recorded.
      Parameters:
        `threshold` - set to -1 to record every query. Value is in milliseconds.

    - #### getConstructor

          protected Constructor<?> getConstructor(int idx,
                                      Class<?> clazz)
                                           throws NoSuchMethodException

      Creates a constructor for a proxy class, if one doesn't already exist
      Parameters:
        `idx` - - the index of the constructor
        `clazz` - - the interface that the proxy will implement
      Returns:
        - returns a constructor used to create new instances
      Throws:
        `NoSuchMethodException` - Constructor not found

    - #### createStatement

          public Object createStatement(Object proxy,
                               Method method,
                               Object[] args,
                               Object statement,
                               long time)

      Creates a statement interceptor to monitor query response times
      Specified by:
        `createStatement` in class `AbstractCreateStatementInterceptor`
      Parameters:
        `proxy` - the actual proxy object
        `method` - the method that was called. It will be one of the methods defined in `AbstractCreateStatementInterceptor.STATEMENT_TYPES`
        `args` - the arguments to the method
        `statement` - the statement that the underlying connection created
        `time` - Elapsed time
      Returns:
        a `Statement` object

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