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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.jdbc.pool;
import java.util.Properties;
import org.apache.tomcat.jdbc.pool.PoolProperties.InterceptorDefinition;
/**
* A list of properties that are configurable for a connection pool.
* The {@link DataSource} object also implements this interface so that it can be easily configured through
* an IoC container without having to specify a secondary object with a setter method.
*
*/
public interface PoolConfiguration {
/**
* JMX prefix for interceptors that register themselves with JMX
*/
String PKG_PREFIX = "org.apache.tomcat.jdbc.pool.interceptor.";
/**
* Connections that have been abandoned (timed out) wont get closed and reported up unless the number of connections in use are
* above the percentage defined by abandonWhenPercentageFull.
* The value should be between 0-100.
* The default value is 0, which implies that connections are eligible for
* closure as soon as removeAbandonedTimeout has been reached.
* @param percentage a value between 0 and 100 to indicate when connections that have been abandoned/timed out are considered abandoned
*/
void setAbandonWhenPercentageFull(int percentage);
/**
* Connections that have been abandoned (timed out) wont get closed and reported up unless the number of connections in use are
* above the percentage defined by abandonWhenPercentageFull.
* The value should be between 0-100.
* The default value is 0, which implies that connections are eligible for
* closure as soon as removeAbandonedTimeout has been reached.
* @return percentage - a value between 0 and 100 to indicate when connections that have been abandoned/timed out are considered abandoned
*/
int getAbandonWhenPercentageFull();
/**
* Returns true if a fair queue is being used by the connection pool
* @return true if a fair waiting queue is being used
*/
boolean isFairQueue();
/**
* Set to true if you wish that calls to getConnection
* should be treated fairly in a true FIFO fashion.
* This uses the {@link FairBlockingQueue} implementation for the list of the idle connections.
* The default value is true.
* This flag is required when you want to use asynchronous connection retrieval.
* @param fairQueue true to use a fair queue
*/
void setFairQueue(boolean fairQueue);
/**
* Property not used. Access is always allowed.
* Access can be achieved by calling unwrap on the pooled connection. see {@link javax.sql.DataSource} interface
* or call getConnection through reflection or cast the object as {@link javax.sql.PooledConnection}
* @return true
*/
boolean isAccessToUnderlyingConnectionAllowed();
/**
* No-op
* @param accessToUnderlyingConnectionAllowed parameter ignored
*/
void setAccessToUnderlyingConnectionAllowed(boolean accessToUnderlyingConnectionAllowed);
/**
* The connection properties that will be sent to the JDBC driver when establishing new connections.
* Format of the string is [propertyName=property;]
* NOTE - The "user" and "password" properties will be passed explicitly, so they do not need to be included here.
* The default value is null.
* @return the connection properties
*/
String getConnectionProperties();
/**
* The properties that will be passed into {@link java.sql.Driver#connect(String, Properties)} method.
* Username and password do not need to be stored here, they will be passed into the properties right before the connection is established.
* @param connectionProperties properties - Format of the string is [propertyName=property;]*
* Example: prop1=value1;prop2=value2
*/
void setConnectionProperties(String connectionProperties);
/**
* Returns the database properties that are passed into the {@link java.sql.Driver#connect(String, Properties)} method.
* @return database properties that are passed into the {@link java.sql.Driver#connect(String, Properties)} method.
*/
Properties getDbProperties();
/**
* Overrides the database properties passed into the {@link java.sql.Driver#connect(String, Properties)} method.
* @param dbProperties The database properties
*/
void setDbProperties(Properties dbProperties);
/**
* The default auto-commit state of connections created by this pool.
* If not set (null), default is JDBC driver default (If set to null then the {@link java.sql.Connection#setAutoCommit(boolean)} method will not be called.)
* @return the default auto commit setting, null is Driver default.
*/
Boolean isDefaultAutoCommit();
/**
* The default auto-commit state of connections created by this pool.
* If not set (null), default is JDBC driver default (If set to null then the {@link java.sql.Connection#setAutoCommit(boolean)} method will not be called.)
* @return the default auto commit setting, null is Driver default.
*/
Boolean getDefaultAutoCommit();
/**
* The default auto-commit state of connections created by this pool.
* If not set (null), default is JDBC driver default (If set to null then the {@link java.sql.Connection#setAutoCommit(boolean)} method will not be called.)
* @param defaultAutoCommit default auto commit setting, null is Driver default.
*/
void setDefaultAutoCommit(Boolean defaultAutoCommit);
/**
* If non null, during connection creation the method {@link java.sql.Connection#setCatalog(String)} will be called with the set value.
* @return the default catalog, null if not set and accepting the driver default.
*/
String getDefaultCatalog();
/**
* If non null, during connection creation the method {@link java.sql.Connection#setCatalog(String)} will be called with the set value.
* @param defaultCatalog null if not set and accepting the driver default.
*/
void setDefaultCatalog(String defaultCatalog);
/**
* If non null, during connection creation the method {@link java.sql.Connection#setReadOnly(boolean)} will be called with the set value.
* @return null if not set and accepting the driver default otherwise the read only value
*/
Boolean isDefaultReadOnly();
/**
* If non null, during connection creation the method {@link java.sql.Connection#setReadOnly(boolean)} will be called with the set value.
* @return null if not set and accepting the driver default otherwise the read only value
*/
Boolean getDefaultReadOnly();
/**
* If non null, during connection creation the method {@link java.sql.Connection#setReadOnly(boolean)} will be called with the set value.
* @param defaultReadOnly null if not set and accepting the driver default.
*/
void setDefaultReadOnly(Boolean defaultReadOnly);
/**
* Returns the default transaction isolation level. If set to {@link DataSourceFactory#UNKNOWN_TRANSACTIONISOLATION} the method
* {@link java.sql.Connection#setTransactionIsolation(int)} will not be called during connection creation.
* @return driver transaction isolation level, or -1 {@link DataSourceFactory#UNKNOWN_TRANSACTIONISOLATION} if not set.
*/
int getDefaultTransactionIsolation();
/**
* If set to {@link DataSourceFactory#UNKNOWN_TRANSACTIONISOLATION} the method
* {@link java.sql.Connection#setTransactionIsolation(int)} will not be called during connection creation. Otherwise the method
* will be called with the isolation level set by this property.
* @param defaultTransactionIsolation a value of {@link java.sql.Connection#TRANSACTION_NONE}, {@link java.sql.Connection#TRANSACTION_READ_COMMITTED},
* {@link java.sql.Connection#TRANSACTION_READ_UNCOMMITTED}, {@link java.sql.Connection#TRANSACTION_REPEATABLE_READ},
* {@link java.sql.Connection#TRANSACTION_SERIALIZABLE} or {@link DataSourceFactory#UNKNOWN_TRANSACTIONISOLATION}
* The last value will not be set on the connection.
*/
void setDefaultTransactionIsolation(int defaultTransactionIsolation);
/**
* The fully qualified Java class name of the JDBC driver to be used. The driver has to be accessible from the same classloader as tomcat-jdbc.jar
* @return fully qualified JDBC driver name.
*/
String getDriverClassName();
/**
* The fully qualified Java class name of the JDBC driver to be used. The driver has to be accessible from the same classloader as tomcat-jdbc.jar
* @param driverClassName a fully qualified Java class name of a {@link java.sql.Driver} implementation.
*/
void setDriverClassName(String driverClassName);
/**
* Returns the number of connections that will be established when the connection pool is started.
* Default value is 10
* @return number of connections to be started when pool is started
*/
int getInitialSize();
/**
* Set the number of connections that will be established when the connection pool is started.
* Default value is 10.
* If this value exceeds {@link #setMaxActive(int)} it will automatically be lowered.
* @param initialSize the number of connections to be established.
*
*/
void setInitialSize(int initialSize);
/**
* boolean flag to set if stack traces should be logged for application code which abandoned a Connection.
* Logging of abandoned Connections adds overhead for every Connection borrow because a stack trace has to be generated.
* The default value is false.
* @return true if the connection pool logs stack traces when connections are borrowed from the pool.
*/
boolean isLogAbandoned();
/**
* boolean flag to set if stack traces should be logged for application code which abandoned a Connection.
* Logging of abandoned Connections adds overhead for every Connection borrow because a stack trace has to be generated.
* The default value is false.
* @param logAbandoned set to true if stack traces should be recorded when {@link DataSource#getConnection()} is called.
*/
void setLogAbandoned(boolean logAbandoned);
/**
* The maximum number of active connections that can be allocated from this pool at the same time. The default value is 100
* @return the maximum number of connections used by this pool
*/
int getMaxActive();
/**
* The maximum number of active connections that can be allocated from this pool at the same time. The default value is 100
* @param maxActive hard limit for number of managed connections by this pool
*/
void setMaxActive(int maxActive);
/**
* The maximum number of connections that should be kept in the idle pool if {@link #isPoolSweeperEnabled()} returns false.
* If the If {@link #isPoolSweeperEnabled()} returns true, then the idle pool can grow up to {@link #getMaxActive}
* and will be shrunk according to {@link #getMinEvictableIdleTimeMillis()} setting.
* Default value is maxActive:100
* @return the maximum number of idle connections.
*/
int getMaxIdle();
/**
* The maximum number of connections that should be kept in the idle pool if {@link #isPoolSweeperEnabled()} returns false.
* If the If {@link #isPoolSweeperEnabled()} returns true, then the idle pool can grow up to {@link #getMaxActive}
* and will be shrunk according to {@link #getMinEvictableIdleTimeMillis()} setting.
* Default value is maxActive:100
* @param maxIdle the maximum size of the idle pool
*/
void setMaxIdle(int maxIdle);
/**
* The maximum number of milliseconds that the pool will wait (when there are no available connections and the
* {@link #getMaxActive} has been reached) for a connection to be returned
* before throwing an exception. Default value is 30000 (30 seconds)
* @return the number of milliseconds to wait for a connection to become available if the pool is maxed out.
*/
int getMaxWait();
/**
* The maximum number of milliseconds that the pool will wait (when there are no available connections and the
* {@link #getMaxActive} has been reached) for a connection to be returned
* before throwing an exception. Default value is 30000 (30 seconds)
* @param maxWait the maximum number of milliseconds to wait.
*/
void setMaxWait(int maxWait);
/**
* The minimum amount of time an object must sit idle in the pool before it is eligible for eviction.
* The default value is 60000 (60 seconds).
* @return the minimum amount of idle time in milliseconds before a connection is considered idle and eligible for eviction.
*/
int getMinEvictableIdleTimeMillis();
/**
* The minimum amount of time an object must sit idle in the pool before it is eligible for eviction.
* The default value is 60000 (60 seconds).
* @param minEvictableIdleTimeMillis the number of milliseconds a connection must be idle to be eligible for eviction.
*/
void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis);
/**
* The minimum number of established connections that should be kept in the pool at all times.
* The connection pool can shrink below this number if validation queries fail and connections get closed.
* Default value is derived from {@link #getInitialSize()} (also see {@link #setTestWhileIdle(boolean)}
* The idle pool will not shrink below this value during an eviction run, hence the number of actual connections
* can be between {@link #getMinIdle()} and somewhere between {@link #getMaxIdle()} and {@link #getMaxActive()}
* @return the minimum number of idle or established connections
*/
int getMinIdle();
/**
* The minimum number of established connections that should be kept in the pool at all times.
* The connection pool can shrink below this number if validation queries fail and connections get closed.
* Default value is derived from {@link #getInitialSize()} (also see {@link #setTestWhileIdle(boolean)}
* The idle pool will not shrink below this value during an eviction run, hence the number of actual connections
* can be between {@link #getMinIdle()} and somewhere between {@link #getMaxIdle()} and {@link #getMaxActive()}
*
* @param minIdle the minimum number of idle or established connections
*/
void setMinIdle(int minIdle);
/**
* Returns the name of the connection pool. By default a JVM unique random name is assigned.
* @return the name of the pool, should be unique in a JVM
*/
String getName();
/**
* Sets the name of the connection pool
* @param name the name of the pool, should be unique in a runtime JVM
*/
void setName(String name);
/**
* Property not used
* @return unknown value
*/
int getNumTestsPerEvictionRun();
/**
* Property not used
* @param numTestsPerEvictionRun parameter ignored.
*/
void setNumTestsPerEvictionRun(int numTestsPerEvictionRun);
/**
* Returns the password used when establishing connections to the database.
* @return the password in string format
*/
String getPassword();
/**
* Sets the password to establish the connection with.
* The password will be included as a database property with the name 'password'.
* @param password The password
* @see #getDbProperties()
*/
void setPassword(String password);
/**
* @see #getName()
* @return the pool name
*/
String getPoolName();
/**
* Returns the username used to establish the connection with
* @return the username used to establish the connection with
*/
String getUsername();
/**
* Sets the username used to establish the connection with
* It will also be a property called 'user' in the database properties.
* @param username The user name
* @see #getDbProperties()
*/
void setUsername(String username);
/**
* boolean flag to remove abandoned connections if they exceed the removeAbandonedTimeout.
* If set to true a connection is considered abandoned and eligible for removal if it has
* been in use longer than the {@link #getRemoveAbandonedTimeout()} and the condition for
* {@link #getAbandonWhenPercentageFull()} is met.
* Setting this to true can recover db connections from applications that fail to close a connection.
* See also {@link #isLogAbandoned()} The default value is false.
* @return true if abandoned connections can be closed and expelled out of the pool
*/
boolean isRemoveAbandoned();
/**
* boolean flag to remove abandoned connections if they exceed the removeAbandonedTimeout.
* If set to true a connection is considered abandoned and eligible for removal if it has
* been in use longer than the {@link #getRemoveAbandonedTimeout()} and the condition for
* {@link #getAbandonWhenPercentageFull()} is met.
* Setting this to true can recover db connections from applications that fail to close a connection.
* See also {@link #isLogAbandoned()} The default value is false.
* @param removeAbandoned set to true if abandoned connections can be closed and expelled out of the pool
*/
void setRemoveAbandoned(boolean removeAbandoned);
/**
* The time in seconds before a connection can be considered abandoned.
* The timer can be reset upon queries using an interceptor.
* @param removeAbandonedTimeout the time in seconds before a used connection can be considered abandoned
* @see org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer
*/
void setRemoveAbandonedTimeout(int removeAbandonedTimeout);
/**
* The time in seconds before a connection can be considered abandoned.
* The timer can be reset upon queries using an interceptor.
* @see org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer
* @return the time in seconds before a used connection can be considered abandoned
*/
int getRemoveAbandonedTimeout();
/**
* The indication of whether objects will be validated before being borrowed from the pool.
* If the object fails to validate, it will be dropped from the pool, and we will attempt to borrow another.
* NOTE - for a true value to have any effect, the validationQuery parameter must be set to a non-null string.
* Default value is false
* In order to have a more efficient validation, see {@link #setValidationInterval(long)}
* @return true if the connection is to be validated upon borrowing a connection from the pool
* @see #getValidationInterval()
*/
boolean isTestOnBorrow();
/**
* The indication of whether objects will be validated before being borrowed from the pool.
* If the object fails to validate, it will be dropped from the pool, and we will attempt to borrow another.
* NOTE - for a true value to have any effect, the validationQuery parameter must be set to a non-null string.
* Default value is false
* In order to have a more efficient validation, see {@link #setValidationInterval(long)}
* @param testOnBorrow set to true if validation should take place before a connection is handed out to the application
* @see #getValidationInterval()
*/
void setTestOnBorrow(boolean testOnBorrow);
/**
* The indication of whether objects will be validated after being returned to the pool.
* If the object fails to validate, it will be dropped from the pool.
* NOTE - for a true value to have any effect, the validationQuery parameter must be set to a non-null string.
* Default value is false
* In order to have a more efficient validation, see {@link #setValidationInterval(long)}
* @return true if validation should take place after a connection is returned to the pool
* @see #getValidationInterval()
*/
boolean isTestOnReturn();
/**
* The indication of whether objects will be validated after being returned to the pool.
* If the object fails to validate, it will be dropped from the pool.
* NOTE - for a true value to have any effect, the validationQuery parameter must be set to a non-null string.
* Default value is false
* In order to have a more efficient validation, see {@link #setValidationInterval(long)}
* @param testOnReturn true if validation should take place after a connection is returned to the pool
* @see #getValidationInterval()
*/
void setTestOnReturn(boolean testOnReturn);
/**
* Set to true if query validation should take place while the connection is idle.
* @return true if validation should take place during idle checks
* @see #setTimeBetweenEvictionRunsMillis(int)
*/
boolean isTestWhileIdle();
/**
* Set to true if query validation should take place while the connection is idle.
* @param testWhileIdle true if validation should take place during idle checks
* @see #setTimeBetweenEvictionRunsMillis(int)
*/
void setTestWhileIdle(boolean testWhileIdle);
/**
* The number of milliseconds to sleep between runs of the idle connection validation, abandoned cleaner
* and idle pool resizing. This value should not be set under 1 second.
* It dictates how often we check for idle, abandoned connections, and how often we validate idle connection and resize the idle pool.
* The default value is 5000 (5 seconds)
* @return the sleep time in between validations in milliseconds
*/
int getTimeBetweenEvictionRunsMillis();
/**
* The number of milliseconds to sleep between runs of the idle connection validation, abandoned cleaner
* and idle pool resizing. This value should not be set under 1 second.
* It dictates how often we check for idle, abandoned connections, and how often we validate idle connection and resize the idle pool.
* The default value is 5000 (5 seconds)
* @param timeBetweenEvictionRunsMillis the sleep time in between validations in milliseconds
*/
void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis);
/**
* The URL used to connect to the database
* @return the configured URL for this connection pool
* @see java.sql.Driver#connect(String, Properties)
*/
String getUrl();
/**
* Sets the URL used to connect to the database
* @param url the configured URL for this connection pool
* @see java.sql.Driver#connect(String, Properties)
*/
void setUrl(String url);
/**
* The SQL query that will be used to validate connections from this
* pool before returning them to the caller or pool.
* If specified, this query does not have to return any data,
* it just can't throw an SQLException.
* The default value is null.
* Example values are SELECT 1(mysql),
* select 1 from dual(oracle),
* SELECT 1(MS Sql Server)
* @return the query used for validation or null if no validation is performed
*/
String getValidationQuery();
/**
* The SQL query that will be used to validate connections from this
* pool before returning them to the caller or pool.
* If specified, this query does not have to return any data,
* it just can't throw an SQLException.
* The default value is null.
* Example values are SELECT 1(mysql),
* select 1 from dual(oracle),
* SELECT 1(MS Sql Server)
* @param validationQuery the query used for validation or null if no validation is performed
*/
void setValidationQuery(String validationQuery);
/**
* The timeout in seconds before a connection validation queries fail.
* A value less than or equal to zero will disable this feature. Defaults to -1.
* @return the timeout value in seconds
*/
int getValidationQueryTimeout();
/**
* The timeout in seconds before a connection validation queries fail.
* A value less than or equal to zero will disable this feature. Defaults to -1.
* @param validationQueryTimeout The timeout value
*/
void setValidationQueryTimeout(int validationQueryTimeout);
/**
* Return the name of the optional validator class - may be null.
*
* @return the name of the optional validator class - may be null
*/
String getValidatorClassName();
/**
* Set the name for an optional validator class which will be used in place of test queries. If set to
* null, standard validation will be used.
*
* @param className the name of the optional validator class
*/
void setValidatorClassName(String className);
/**
* @return the optional validator object - may be null
*/
Validator getValidator();
/**
* Sets the validator object
* If this is a non null object, it will be used as a validator instead of the validationQuery
* If this is null, remove the usage of the validator.
* @param validator The validator object
*/
void setValidator(Validator validator);
/**
* avoid excess validation, only run validation at most at this frequency - time in milliseconds.
* If a connection is due for validation, but has been validated previously
* within this interval, it will not be validated again.
* The default value is 3000 (3 seconds).
* @return the validation interval in milliseconds
*/
long getValidationInterval();
/**
* avoid excess validation, only run validation at most at this frequency - time in milliseconds.
* If a connection is due for validation, but has been validated previously
* within this interval, it will not be validated again.
* The default value is 3000 (3 seconds).
* @param validationInterval the validation interval in milliseconds
*/
void setValidationInterval(long validationInterval);
/**
* A custom query to be run when a connection is first created. The default value is null.
* This query only runs once per connection, and that is when a new connection is established to the database.
* If this value is non null, it will replace the validation query during connection creation.
* @return the init SQL used to run against the DB or null if not set
*/
String getInitSQL();
/**
* A custom query to be run when a connection is first created. The default value is null.
* This query only runs once per connection, and that is when a new connection is established to the database.
* If this value is non null, it will replace the validation query during connection creation.
* @param initSQL the init SQL used to run against the DB or null if no query should be executed
*/
void setInitSQL(String initSQL);
/**
* Returns true if we should run the validation query when connecting to the database for the first time on a connection.
* Normally this is always set to false, unless one wants to use the validationQuery as an init query.
* @return true if we should run the validation query upon connect
*/
boolean isTestOnConnect();
/**
* Set to true if we should run the validation query when connecting to the database for the first time on a connection.
* Normally this is always set to false, unless one wants to use the validationQuery as an init query.
* Setting an {@link #setInitSQL(String)} will override this setting, as the init SQL will be used instead of the validation query
* @param testOnConnect set to true if we should run the validation query upon connect
*/
void setTestOnConnect(boolean testOnConnect);
/**
* A semicolon separated list of classnames extending {@link org.apache.tomcat.jdbc.pool.JdbcInterceptor} class.
* These interceptors will be inserted as an interceptor into the chain of operations on a java.sql.Connection object.
* Example interceptors are {@link org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer StatementFinalizer} to close all
* used statements during the session.
* {@link org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer ResetAbandonedTimer} resets the timer upon every operation
* on the connection or a statement.
* {@link org.apache.tomcat.jdbc.pool.interceptor.ConnectionState ConnectionState} caches the auto commit, read only and catalog settings to avoid round trips to the DB.
* The default value is null.
* @return the interceptors that are used for connections.
* Example format: 'ConnectionState(useEquals=true,fast=yes);ResetAbandonedTimer'
*/
String getJdbcInterceptors();
/**
* A semicolon separated list of classnames extending {@link org.apache.tomcat.jdbc.pool.JdbcInterceptor} class.
* These interceptors will be inserted as an interceptor into the chain of operations on a java.sql.Connection object.
* Example interceptors are {@link org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer StatementFinalizer} to close all
* used statements during the session.
* {@link org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer ResetAbandonedTimer} resets the timer upon every operation
* on the connection or a statement.
* {@link org.apache.tomcat.jdbc.pool.interceptor.ConnectionState ConnectionState} caches the auto commit, read only and catalog settings to avoid round trips to the DB.
* The default value is null.
* @param jdbcInterceptors the interceptors that are used for connections.
* Example format: 'ConnectionState(useEquals=true,fast=yes);ResetAbandonedTimer'
*/
void setJdbcInterceptors(String jdbcInterceptors);
/**
* Returns the {@link #getJdbcInterceptors()} as an array of objects with properties and the classes.
* @return an array of interceptors that have been configured
*/
InterceptorDefinition[] getJdbcInterceptorsAsArray();
/**
* If set to true, the connection pool creates a {@link org.apache.tomcat.jdbc.pool.jmx.ConnectionPoolMBean} object
* that can be registered with JMX to receive notifications and state about the pool.
* The ConnectionPool object doesn't register itself, as there is no way to keep a static non changing ObjectName across JVM restarts.
* @return true if the mbean object will be created upon startup.
*/
boolean isJmxEnabled();
/**
* If set to true, the connection pool creates a {@link org.apache.tomcat.jdbc.pool.jmx.ConnectionPoolMBean} object
* that can be registered with JMX to receive notifications and state about the pool.
* The ConnectionPool object doesn't register itself, as there is no way to keep a static non changing ObjectName across JVM restarts.
* @param jmxEnabled set to to if the mbean object should be created upon startup.
*/
void setJmxEnabled(boolean jmxEnabled);
/**
* Returns true if the pool sweeper is enabled for the connection pool.
* The pool sweeper is enabled if any settings that require async intervention in the pool are turned on
*
* boolean result = getTimeBetweenEvictionRunsMillis()>0;
* result = result && (isRemoveAbandoned() && getRemoveAbandonedTimeout()>0);
* result = result || (isTestWhileIdle() && getValidationQuery()!=null);
* return result;
*
*
* @return true if a background thread is or will be enabled for this pool
*/
boolean isPoolSweeperEnabled();
/**
* Set to true if you wish the ProxyConnection class to use String.equals instead of
* == when comparing method names.
* This property does not apply to added interceptors as those are configured individually.
* The default value is false.
* @return true if pool uses {@link String#equals(Object)} instead of == when comparing method names on {@link java.sql.Connection} methods
*/
boolean isUseEquals();
/**
* Set to true if you wish the ProxyConnection class to use String.equals instead of
* == when comparing method names.
* This property does not apply to added interceptors as those are configured individually.
* The default value is false.
* @param useEquals set to true if the pool should use {@link String#equals(Object)} instead of ==
* when comparing method names on {@link java.sql.Connection} methods
*/
void setUseEquals(boolean useEquals);
/**
* Time in milliseconds to keep this connection before reconnecting.
* When a connection is idle, returned to the pool or borrowed from the pool, the pool will
* check to see if the ((now - time-when-connected) > maxAge) has been reached, and if so,
* it reconnects. Note that the age of idle connections will only be checked if
* {@link #getTimeBetweenEvictionRunsMillis()} returns a value greater than 0.
* The default value is 0, which implies that connections will be left open and no
* age checks will be done.
* This is a useful setting for database sessions that leak memory as it ensures that the session
* will have a finite life span.
* @return the time in milliseconds a connection will be open for when used
*/
long getMaxAge();
/**
* Time in milliseconds to keep this connection before reconnecting.
* When a connection is idle, returned to the pool or borrowed from the pool, the pool will
* check to see if the ((now - time-when-connected) > maxAge) has been reached, and if so,
* it reconnects. Note that the age of idle connections will only be checked if
* {@link #getTimeBetweenEvictionRunsMillis()} returns a value greater than 0.
* The default value is 0, which implies that connections will be left open and no
* age checks will be done.
* This is a useful setting for database sessions that leak memory as it ensures that the session
* will have a finite life span.
* @param maxAge the time in milliseconds a connection will be open for when used
*/
void setMaxAge(long maxAge);
/**
* Return true if a lock should be used when operations are performed on the connection object.
* Should be set to false unless you plan to have a background thread of your own doing idle and abandon checking
* such as JMX clients. If the pool sweeper is enabled, then the lock will automatically be used regardless of this setting.
* @return true if a lock is used.
*/
boolean getUseLock();
/**
* Set to true if a lock should be used when operations are performed on the connection object.
* Should be set to false unless you plan to have a background thread of your own doing idle and abandon checking
* such as JMX clients. If the pool sweeper is enabled, then the lock will automatically be used regardless of this setting.
* @param useLock set to true if a lock should be used on connection operations
*/
void setUseLock(boolean useLock);
/**
* Similar to {@link #setRemoveAbandonedTimeout(int)} but instead of treating the connection
* as abandoned, and potentially closing the connection, this simply logs the warning if
* {@link #isLogAbandoned()} returns true. If this value is equal or less than 0, no suspect
* checking will be performed. Suspect checking only takes place if the timeout value is larger than 0 and
* the connection was not abandoned or if abandon check is disabled. If a connection is suspect a WARN message gets
* logged and a JMX notification gets sent once.
* @param seconds - the amount of time in seconds that has to pass before a connection is marked suspect.
*/
void setSuspectTimeout(int seconds);
/**
* Returns the time in seconds to pass before a connection is marked an abandoned suspect.
* Any value lesser than or equal to 0 means the check is disabled.
* @return Returns the time in seconds to pass before a connection is marked an abandoned suspect.
*/
int getSuspectTimeout();
/**
* Injects a datasource that will be used to retrieve/create connections.
* If a data source is set, the {@link PoolConfiguration#getUrl()} and {@link PoolConfiguration#getDriverClassName()} methods are ignored
* and not used by the pool. If the {@link PoolConfiguration#getUsername()} and {@link PoolConfiguration#getPassword()}
* values are set, the method {@link javax.sql.DataSource#getConnection(String, String)} method will be called instead of the
* {@link javax.sql.DataSource#getConnection()} method.
* If the data source implements {@link javax.sql.XADataSource} the methods
* {@link javax.sql.XADataSource#getXAConnection()} and {@link javax.sql.XADataSource#getXAConnection(String,String)}
* will be invoked.
* @param ds the {@link javax.sql.DataSource} to be used for creating connections to be pooled.
*/
void setDataSource(Object ds);
/**
* Returns a datasource, if one exists that is being used to create connections.
* This method will return null if the pool is using a {@link java.sql.Driver}
* @return the {@link javax.sql.DataSource} to be used for creating connections to be pooled or null if a Driver is used.
*/
Object getDataSource();
/**
* Configure the connection pool to use a DataSource according to {@link PoolConfiguration#setDataSource(Object)}
* But instead of injecting the object, specify the JNDI location.
* After a successful JNDI look, the {@link PoolConfiguration#getDataSource()} will not return null.
* @param jndiDS -the JNDI string @TODO specify the rules here.
*/
void setDataSourceJNDI(String jndiDS);
/**
* Returns the JNDI string configured for data source usage.
* @return the JNDI string or null if not set
*/
String getDataSourceJNDI();
/**
* Returns true if the call {@link DataSource#getConnection(String, String) getConnection(username,password)} is
* allowed. This is used for when the pool is used by an application accessing multiple schemas.
* There is a performance impact turning this option on.
* @return true if {@link DataSource#getConnection(String, String) getConnection(username,password)} is honored, false if it is ignored.
*/
boolean isAlternateUsernameAllowed();
/**
* Set to true if the call {@link DataSource#getConnection(String, String) getConnection(username,password)} is
* allowed and honored.. This is used for when the pool is used by an application accessing multiple schemas.
* There is a performance impact turning this option on, even when not used due to username checks.
* @param alternateUsernameAllowed - set true if {@link DataSource#getConnection(String, String) getConnection(username,password)} is honored,
* false if it is to be ignored.
*/
void setAlternateUsernameAllowed(boolean alternateUsernameAllowed);
/**
* Set to true if you want the connection pool to commit any pending transaction when a connection is returned.
* The default value is false, as this could result in committing data.
* This parameter is only looked at if the {@link #getDefaultAutoCommit()} returns false
* @param commitOnReturn set to true if the pool should call {@link java.sql.Connection#commit()} when a connection is returned to the pool.
* Default is false
*/
void setCommitOnReturn(boolean commitOnReturn);
/**
* @see PoolConfiguration#setCommitOnReturn(boolean)
* @return true if the pool should commit when a connection is returned to it
*/
boolean getCommitOnReturn();
/**
* Set to true if you want the connection pool to rollback any pending transaction when a connection is returned.
* The default value is false, as this could result in committing data.
* This parameter is only looked at if the {@link #getDefaultAutoCommit()} returns false
* @param rollbackOnReturn set to true if the pool should call {@link java.sql.Connection#rollback()} when a connection is returned to the pool.
* Default is false
*/
void setRollbackOnReturn(boolean rollbackOnReturn);
/**
* @see PoolConfiguration#setRollbackOnReturn(boolean)
* @return true if the pool should rollback when a connection is returned to it
*/
boolean getRollbackOnReturn();
/**
* If set to true, the connection will be wrapped with facade that will disallow the connection to be used after
* {@link java.sql.Connection#close()} is called. If set to true, after {@link java.sql.Connection#close()} all calls except
* {@link java.sql.Connection#close()} and {@link java.sql.Connection#isClosed()} will throw an exception.
* @param useDisposableConnectionFacade true to use a facade
*/
void setUseDisposableConnectionFacade(boolean useDisposableConnectionFacade);
/**
* Returns true if this connection pool is configured to use a connection facade to prevent re-use of connection after
* {@link java.sql.Connection#close()} has been invoked
* @return true if {@link java.sql.Connection#close()} has been invoked.
*/
boolean getUseDisposableConnectionFacade();
/**
* Set to true if you wish that errors from validation should be logged as error messages.
* @param logValidationErrors set to true to log validation errors
*/
void setLogValidationErrors(boolean logValidationErrors);
/**
* Returns true if errors that happen during validation will be logged
* @return true if errors that happen during validation will be logged
*/
boolean getLogValidationErrors();
/**
* Returns true if the pool is configured to propagate interrupt state of a thread.
* A thread waiting for a connection, can have its wait interrupted, and by default
* will clear the interrupt flag and throw a {@link PoolExhaustedException}
* @return true if the pool is configured to propagate and not clear the thread interrupt state
*/
boolean getPropagateInterruptState();
/**
* Configure the pool to propagate interrupt state for interrupted threads waiting for a connection
* A thread waiting for a connection, can have its wait interrupted, and by default
* will clear the interrupt flag and throw a {@link PoolExhaustedException}
* If set to true, this behavior will change, while the {@link PoolExhaustedException} is still thrown, the threads interrupted state is still set.
* @param propagateInterruptState - set to true to not clear, but propagate, a threads interrupted state.
*/
void setPropagateInterruptState(boolean propagateInterruptState);
/**
* Set to true if you want to ignore error of connection creation while initializing the pool.
* Set to false if you want to fail the initialization of the pool by throwing exception.
* @param ignoreExceptionOnPreLoad set to true if you want to ignore error of connection creation while initializing the pool.
*/
void setIgnoreExceptionOnPreLoad(boolean ignoreExceptionOnPreLoad);
/**
* @return true to ignore exceptions
* @see PoolConfiguration#setIgnoreExceptionOnPreLoad(boolean)
*/
boolean isIgnoreExceptionOnPreLoad();
/**
* Set this to true if you wish to wrap statements in order to enable equals() and hashCode()
* methods to be called on the closed statements if any statement proxy is set.
* @param useStatementFacade set to true to wrap statements
*/
void setUseStatementFacade(boolean useStatementFacade);
/**
* Returns true if this connection pool is configured to wrap statements in order
* to enable equals() and hashCode() methods to be called on the closed statements if any
* statement proxy is set.
* @return true if the statements are wrapped
*/
boolean getUseStatementFacade();
}
