com.flowable.policy.engine

Class PolicyEngineConfiguration

java.lang.Object

org.flowable.common.engine.impl.AbstractEngineConfiguration

com.flowable.policy.engine.PolicyEngineConfiguration

All Implemented Interfaces:

PolicyEngineConfigurationApi, org.flowable.common.spring.SpringEngineConfiguration, org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware, org.springframework.context.Lifecycle, org.springframework.context.Phased, org.springframework.context.SmartLifecycle

public class PolicyEngineConfiguration
extends org.flowable.common.engine.impl.AbstractEngineConfiguration
implements org.flowable.common.spring.SpringEngineConfiguration, PolicyEngineConfigurationApi

Field Summary

Fields

Modifier and Type	Field and Description
protected org.springframework.context.ApplicationContext	applicationContext
protected PolicyDataManagers	dataManagers
static String	DEFAULT_ENGINE_NAME
static String	DEFAULT_MYBATIS_MAPPING_FILE
protected PolicyDeploymentManager	deploymentManager
protected String	deploymentMode
protected String	deploymentName
protected org.springframework.core.io.Resource[]	deploymentResources
protected List<String>	enginesBuild
protected PolicyEntityManagers	entityManagers
protected String	history
protected org.flowable.common.engine.impl.history.HistoryLevel	historyLevel
static String	KEY_POLICY_ENGINE_CONFIG
protected Object	lifeCycleMonitor
static String	LIQUIBASE_CHANGELOG_PREFIX
protected com.fasterxml.jackson.databind.ObjectMapper	objectMapper
protected org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry>	policyDefinitionCache
protected int	policyDefinitionCacheLimit
protected PolicyDefinitionDeployer	policyDefinitionDeployer
protected String	policyEngineName
protected PolicyRepositoryService	policyRepositoryService
protected PolicyResourceConverter	policyResourceConverter
protected boolean	running
protected org.springframework.transaction.PlatformTransactionManager	transactionManager
protected Integer	transactionSynchronizationAdapterOrder

Fields inherited from class org.flowable.common.engine.impl.AbstractEngineConfiguration

additionalEventDispatchActions, allConfigurators, alwaysLookupLatestDefinitionVersion, beans, classLoader, clock, commandContextFactory, commandExecutor, commandInterceptors, commandInvoker, commonSchemaManager, configurators, customMybatisInterceptors, customMybatisMappers, customMybatisXMLMappers, customPostCommandInterceptors, customPostDeployers, customPreCommandInterceptors, customPreDeployers, customSessionFactories, DATABASE_TYPE_COCKROACHDB, DATABASE_TYPE_DB2, DATABASE_TYPE_H2, DATABASE_TYPE_HSQL, DATABASE_TYPE_MSSQL, DATABASE_TYPE_MYSQL, DATABASE_TYPE_ORACLE, DATABASE_TYPE_POSTGRES, databaseCatalog, databaseSchema, databaseSchemaUpdate, databaseTablePrefix, databaseType, databaseTypeMappings, databaseWildcardEscapeCharacter, dataSource, dataSourceJndiName, DB_SCHEMA_UPDATE_CREATE, DB_SCHEMA_UPDATE_CREATE_DROP, DB_SCHEMA_UPDATE_DROP_CREATE, DB_SCHEMA_UPDATE_FALSE, DB_SCHEMA_UPDATE_TRUE, dbSqlSessionFactory, DEFAULT_GENERIC_MAX_LENGTH_STRING, DEFAULT_MAX_NR_OF_STATEMENTS_BULK_INSERT_SQL_SERVER, DEFAULT_ORACLE_MAX_LENGTH_STRING, defaultCommandConfig, defaultCommandInterceptors, defaultTenantProvider, dependentEngineMybatisTypeAliasConfigs, dependentEngineMybatisTypeHandlerConfigs, dependentEngineMyBatisXmlMappers, deployers, enableConfiguratorServiceLoader, enableEventDispatcher, enableLogSqlExecutionTime, engineConfigurations, eventDispatcher, eventListeners, fallbackToDefaultTenant, forceCloseMybatisConnectionPool, idGenerator, idmEngineConfigurator, isBulkInsertEnabled, isDbHistoryUsed, jdbcDefaultTransactionIsolationLevel, jdbcDriver, jdbcMaxActiveConnections, jdbcMaxCheckoutTime, jdbcMaxIdleConnections, jdbcMaxWaitTime, jdbcPassword, jdbcPingConnectionNotUsedFor, jdbcPingEnabled, jdbcPingQuery, jdbcUrl, jdbcUsername, logger, maxLengthStringVariableType, maxNrOfStatementsInBulkInsert, mybatisMappingFile, NO_TENANT_ID, PRODUCT_NAME_CRDB, PRODUCT_NAME_POSTGRES, schemaCommandConfig, schemaManagementCmd, schemaManager, serviceConfigurations, sessionFactories, sqlSessionFactory, tablePrefixIsSchema, transactionContextFactory, transactionFactory, transactionsExternallyManaged, typedEventListeners, useClassForNameClassLoading, usePrefixId, usingRelationalDatabase, usingSchemaMgmt, xmlEncoding

Fields inherited from interface org.flowable.common.spring.SpringEngineConfiguration

PHASE, PHASE_DELTA

Fields inherited from interface org.springframework.context.SmartLifecycle

DEFAULT_PHASE

Constructor Summary

Constructors

Constructor and Description
PolicyEngineConfiguration()

Method Summary

Modifier and Type	Method and Description
protected void	autoDeployResources(PolicyEngine policyEngine)
PolicyEngine	buildActionEngine()
org.flowable.common.engine.impl.interceptor.CommandInterceptor	createTransactionInterceptor()
org.springframework.context.ApplicationContext	getApplicationContext()
protected AutoDeploymentStrategy	getAutoDeploymentStrategy(String mode) Gets the AutoDeploymentStrategy for the provided mode.
PolicyDataManagers	getDataManagers()
Collection<? extends org.flowable.common.engine.impl.EngineDeployer>	getDefaultDeployers()
PolicyDeploymentManager	getDeploymentManager()
String	getDeploymentMode()
String	getDeploymentName()
org.springframework.core.io.Resource[]	getDeploymentResources()
String	getEngineCfgKey()
String	getEngineName()
PolicyEntityManagers	getEntityManagers()
String	getHistory()
org.flowable.common.engine.impl.history.HistoryLevel	getHistoryLevel()
InputStream	getMyBatisXmlConfigurationStream()
com.fasterxml.jackson.databind.ObjectMapper	getObjectMapper()
int	getPhase()
org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry>	getPolicyDefinitionCache()
int	getPolicyDefinitionCacheLimit()
PolicyDefinitionDeployer	getPolicyDefinitionDeployer()
String	getPolicyEngineName()
PolicyRepositoryService	getPolicyRepositoryService()
PolicyResourceConverter	getPolicyResourceConverter()
org.springframework.transaction.PlatformTransactionManager	getTransactionManager()
protected void	init()
void	initDataManagers()
protected void	initDbSqlSessionFactoryEntitySettings()
void	initDefaultCommandConfig()
protected void	initDeployers()
protected void	initDeploymentManager()
void	initEntityManagers()
void	initHistoryLevel()
void	initObjectMapper()
protected void	initPolicyDefinitionCache()
protected void	initPolicyResourceConverter()
void	initSchemaManagementCommand()
void	initSchemaManager()
protected void	initServices()
void	initTransactionContextFactory()
boolean	isRunning()
void	setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
PolicyEngineConfiguration	setDataSource(DataSource dataSource)
void	setDeploymentManager(PolicyDeploymentManager deploymentManager)
void	setDeploymentMode(String deploymentMode)
void	setDeploymentName(String deploymentName)
void	setDeploymentResources(org.springframework.core.io.Resource[] deploymentResources)
void	setHistory(String history)
void	setHistoryLevel(org.flowable.common.engine.impl.history.HistoryLevel historyLevel)
void	setObjectMapper(com.fasterxml.jackson.databind.ObjectMapper objectMapper)
void	setPolicyDefinitionCache(org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry> policyDefinitionCache)
void	setPolicyDefinitionCacheLimit(int policyDefinitionCacheLimit)
void	setPolicyDefinitionDeployer(PolicyDefinitionDeployer policyDefinitionDeployer)
void	setPolicyEngineName(String policyEngineName)
void	setPolicyRepositoryService(PolicyRepositoryService policyRepositoryService)
void	setPolicyResourceConverter(PolicyResourceConverter policyResourceConverter)
void	setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager)
void	setTransactionSynchronizationAdapterOrder(Integer transactionSynchronizationAdapterOrder)
void	start()
void	stop()

Methods inherited from class org.flowable.common.engine.impl.AbstractEngineConfiguration

addConfigurator, addCustomSessionFactory, addEngineConfiguration, addServiceConfiguration, addSessionFactory, close, configuratorsAfterInit, configuratorsBeforeInit, createDbSqlSessionFactory, defaultInitDbSqlSessionFactoryEntitySettings, getAdditionalDefaultCommandInterceptors, getAdditionalEventDispatchActions, getBeans, getClassLoader, getClock, getCommandContextFactory, getCommandExecutor, getCommandInterceptors, getCommandInvoker, getCommonSchemaManager, getConfigurators, getCustomMybatisInterceptors, getCustomMybatisMappers, getCustomMybatisXMLMappers, getCustomPostCommandInterceptors, getCustomPostDeployers, getCustomPreCommandInterceptors, getCustomPreDeployers, getCustomSessionFactories, getDatabaseCatalog, getDatabaseSchema, getDatabaseSchemaUpdate, getDatabaseTablePrefix, getDatabaseType, getDatabaseWildcardEscapeCharacter, getDataSource, getDataSourceJndiName, getDbSqlSessionFactory, getDefaultCommandConfig, getDefaultCommandInterceptors, getDefaultDatabaseTypeMappings, getDefaultTenantProvider, getDefaultTenantValue, getDependentEngineMybatisTypeAliasConfigs, getDependentEngineMybatisTypeHandlerConfigs, getDependentEngineMyBatisXmlMappers, getDeployers, getEngineConfigurations, getEngineSpecificEngineConfigurators, getEventDispatcher, getEventListeners, getIdGenerator, getIdmEngineConfigurator, getJdbcDefaultTransactionIsolationLevel, getJdbcDriver, getJdbcMaxActiveConnections, getJdbcMaxCheckoutTime, getJdbcMaxIdleConnections, getJdbcMaxWaitTime, getJdbcPassword, getJdbcPingConnectionNotUsedFor, getJdbcPingQuery, getJdbcUrl, getJdbcUsername, getMaxLengthString, getMaxLengthStringVariableType, getMaxNrOfStatementsInBulkInsert, getMybatisMappingFile, getResourceAsStream, getSchemaCommandConfig, getSchemaManagementCmd, getSchemaManager, getServiceConfigurations, getSessionFactories, getSqlSessionFactory, getTransactionContextFactory, getTransactionFactory, getTypedEventListeners, getXmlEncoding, initAdditionalEventDispatchActions, initBeans, initClock, initCommandContextFactory, initCommandExecutor, initCommandExecutors, initCommandInterceptors, initCommandInvoker, initConfigurators, initCustomMybatisInterceptors, initCustomMybatisMappers, initDatabaseType, initDataSource, initDbSqlSessionFactory, initEngineConfigurations, initEventDispatcher, initEventListeners, initIdGenerator, initInterceptorChain, initMybatisConfiguration, initMyBatisLogSqlExecutionTimePlugin, initMybatisTypeHandlers, initSchemaCommandConfig, initService, initSessionFactories, initSqlSessionFactory, initTransactionFactory, initTypedEventListeners, isAlwaysLookupLatestDefinitionVersion, isBulkInsertEnabled, isDbHistoryUsed, isEnableConfiguratorServiceLoader, isEnableEventDispatcher, isEnableLogSqlExecutionTime, isFallbackToDefaultTenant, isForceCloseMybatisConnectionPool, isJdbcPingEnabled, isTablePrefixIsSchema, isTransactionsExternallyManaged, isUseClassForNameClassLoading, isUsePrefixId, isUsingRelationalDatabase, isUsingSchemaMgmt, parseCustomMybatisXMLMappers, parseDependentEngineMybatisXMLMappers, parseMybatisConfiguration, parseMybatisXmlMapping, pathToEngineDbProperties, setAdditionalEventDispatchActions, setAlwaysLookupLatestDefinitionVersion, setBeans, setBulkInsertEnabled, setClassLoader, setClock, setCommandContextFactory, setCommandExecutor, setCommandInterceptors, setCommandInvoker, setCommonSchemaManager, setConfigurators, setCustomMybatisInterceptors, setCustomMybatisMappers, setCustomMybatisXMLMappers, setCustomPostCommandInterceptors, setCustomPostDeployers, setCustomPreCommandInterceptors, setCustomPreDeployers, setCustomSessionFactories, setDatabaseCatalog, setDatabaseSchema, setDatabaseSchemaUpdate, setDatabaseTablePrefix, setDatabaseType, setDatabaseWildcardEscapeCharacter, setDataSourceJndiName, setDbHistoryUsed, setDbSqlSessionFactory, setDefaultCommandConfig, setDefaultCommandInterceptors, setDefaultTenantProvider, setDefaultTenantValue, setDependentEngineMybatisTypeAliasConfigs, setDependentEngineMybatisTypeHandlerConfigs, setDependentEngineMyBatisXmlMappers, setDeployers, setEnableConfiguratorServiceLoader, setEnableEventDispatcher, setEnableLogSqlExecutionTime, setEngineConfigurations, setEventDispatcher, setEventListeners, setFallbackToDefaultTenant, setForceCloseMybatisConnectionPool, setIdGenerator, setIdmEngineConfigurator, setJdbcDefaultTransactionIsolationLevel, setJdbcDriver, setJdbcMaxActiveConnections, setJdbcMaxCheckoutTime, setJdbcMaxIdleConnections, setJdbcMaxWaitTime, setJdbcPassword, setJdbcPingConnectionNotUsedFor, setJdbcPingEnabled, setJdbcPingQuery, setJdbcUrl, setJdbcUsername, setMaxLengthStringVariableType, setMaxNrOfStatementsInBulkInsert, setMybatisMappingFile, setSchemaCommandConfig, setSchemaManagementCmd, setSchemaManager, setServiceConfigurations, setSessionFactories, setSqlSessionFactory, setTablePrefixIsSchema, setTransactionContextFactory, setTransactionFactory, setTransactionsExternallyManaged, setTypedEventListeners, setUseClassForNameClassLoading, setUsePrefixId, setUsingRelationalDatabase, setUsingSchemaMgmt, setXmlEncoding

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.flowable.common.spring.SpringEngineConfiguration

getBeans, isAutoStartup, stop

Field Detail

DEFAULT_MYBATIS_MAPPING_FILE

public static final String DEFAULT_MYBATIS_MAPPING_FILE

See Also:

Constant Field Values

DEFAULT_ENGINE_NAME

public static final String DEFAULT_ENGINE_NAME

See Also:

Constant Field Values

KEY_POLICY_ENGINE_CONFIG

public static final String KEY_POLICY_ENGINE_CONFIG

See Also:

Constant Field Values

LIQUIBASE_CHANGELOG_PREFIX

public static final String LIQUIBASE_CHANGELOG_PREFIX

See Also:

Constant Field Values

policyEngineName

protected String policyEngineName

policyRepositoryService

protected PolicyRepositoryService policyRepositoryService

dataManagers

protected final PolicyDataManagers dataManagers

entityManagers

protected final PolicyEntityManagers entityManagers

transactionManager

protected org.springframework.transaction.PlatformTransactionManager transactionManager

transactionSynchronizationAdapterOrder

protected Integer transactionSynchronizationAdapterOrder

applicationContext

protected org.springframework.context.ApplicationContext applicationContext

running

protected volatile boolean running

policyDefinitionDeployer

protected PolicyDefinitionDeployer policyDefinitionDeployer

deploymentManager

protected PolicyDeploymentManager deploymentManager

policyResourceConverter

protected PolicyResourceConverter policyResourceConverter

policyDefinitionCacheLimit

protected int policyDefinitionCacheLimit

policyDefinitionCache

protected org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry> policyDefinitionCache

deploymentName

protected String deploymentName

deploymentResources

protected org.springframework.core.io.Resource[] deploymentResources

deploymentMode

protected String deploymentMode

enginesBuild

protected List<String> enginesBuild

lifeCycleMonitor

protected final Object lifeCycleMonitor

history

protected String history

historyLevel

protected org.flowable.common.engine.impl.history.HistoryLevel historyLevel

objectMapper

protected com.fasterxml.jackson.databind.ObjectMapper objectMapper

Constructor Detail

PolicyEngineConfiguration

public PolicyEngineConfiguration()

Method Detail

getEngineCfgKey

public String getEngineCfgKey()

Specified by:

getEngineCfgKey in class org.flowable.common.engine.impl.AbstractEngineConfiguration

createTransactionInterceptor

public org.flowable.common.engine.impl.interceptor.CommandInterceptor createTransactionInterceptor()

Specified by:

createTransactionInterceptor in class org.flowable.common.engine.impl.AbstractEngineConfiguration

initDbSqlSessionFactoryEntitySettings

protected void initDbSqlSessionFactoryEntitySettings()

Specified by:

initDbSqlSessionFactoryEntitySettings in class org.flowable.common.engine.impl.AbstractEngineConfiguration

getMyBatisXmlConfigurationStream

public InputStream getMyBatisXmlConfigurationStream()

Specified by:

getMyBatisXmlConfigurationStream in class org.flowable.common.engine.impl.AbstractEngineConfiguration

getEngineName

public String getEngineName()

Specified by:

getEngineName in class org.flowable.common.engine.impl.AbstractEngineConfiguration

setTransactionSynchronizationAdapterOrder

public void setTransactionSynchronizationAdapterOrder(Integer transactionSynchronizationAdapterOrder)

getDataManagers

public PolicyDataManagers getDataManagers()

getEntityManagers

public PolicyEntityManagers getEntityManagers()

getObjectMapper

public com.fasterxml.jackson.databind.ObjectMapper getObjectMapper()

setObjectMapper

public void setObjectMapper(com.fasterxml.jackson.databind.ObjectMapper objectMapper)

setDataSource

public PolicyEngineConfiguration setDataSource(DataSource dataSource)

Overrides:

setDataSource in class org.flowable.common.engine.impl.AbstractEngineConfiguration

buildActionEngine

public PolicyEngine buildActionEngine()

init

protected void init()

initServices

protected void initServices()

initTransactionContextFactory

public void initTransactionContextFactory()

Overrides:

initTransactionContextFactory in class org.flowable.common.engine.impl.AbstractEngineConfiguration

initDefaultCommandConfig

public void initDefaultCommandConfig()

Overrides:

initDefaultCommandConfig in class org.flowable.common.engine.impl.AbstractEngineConfiguration

initDataManagers

public void initDataManagers()

initEntityManagers

public void initEntityManagers()

initHistoryLevel

public void initHistoryLevel()

initSchemaManager

public void initSchemaManager()

Overrides:

initSchemaManager in class org.flowable.common.engine.impl.AbstractEngineConfiguration

initSchemaManagementCommand

public void initSchemaManagementCommand()

initObjectMapper

public void initObjectMapper()

initDeployers

protected void initDeployers()

getDefaultDeployers

public Collection<? extends org.flowable.common.engine.impl.EngineDeployer> getDefaultDeployers()

initPolicyDefinitionCache

protected void initPolicyDefinitionCache()

initPolicyResourceConverter

protected void initPolicyResourceConverter()

initDeploymentManager

protected void initDeploymentManager()

getTransactionManager

public org.springframework.transaction.PlatformTransactionManager getTransactionManager()

Specified by:

getTransactionManager in interface org.flowable.common.spring.SpringEngineConfiguration

setTransactionManager

public void setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager)

Specified by:

setTransactionManager in interface org.flowable.common.spring.SpringEngineConfiguration

getDeploymentName

public String getDeploymentName()

Specified by:

getDeploymentName in interface org.flowable.common.spring.SpringEngineConfiguration

setDeploymentName

public void setDeploymentName(String deploymentName)

Specified by:

setDeploymentName in interface org.flowable.common.spring.SpringEngineConfiguration

getDeploymentResources

public org.springframework.core.io.Resource[] getDeploymentResources()

Specified by:

getDeploymentResources in interface org.flowable.common.spring.SpringEngineConfiguration

setDeploymentResources

public void setDeploymentResources(org.springframework.core.io.Resource[] deploymentResources)

Specified by:

setDeploymentResources in interface org.flowable.common.spring.SpringEngineConfiguration

getApplicationContext

public org.springframework.context.ApplicationContext getApplicationContext()

Specified by:

getApplicationContext in interface org.flowable.common.spring.SpringEngineConfiguration

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext applicationContext)

Specified by:

setApplicationContext in interface org.flowable.common.spring.SpringEngineConfiguration

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

getDeploymentMode

public String getDeploymentMode()

Specified by:

getDeploymentMode in interface org.flowable.common.spring.SpringEngineConfiguration

setDeploymentMode

public void setDeploymentMode(String deploymentMode)

Specified by:

setDeploymentMode in interface org.flowable.common.spring.SpringEngineConfiguration

getPolicyEngineName

public String getPolicyEngineName()

setPolicyEngineName

public void setPolicyEngineName(String policyEngineName)

getPolicyDefinitionDeployer

public PolicyDefinitionDeployer getPolicyDefinitionDeployer()

setPolicyDefinitionDeployer

public void setPolicyDefinitionDeployer(PolicyDefinitionDeployer policyDefinitionDeployer)

getDeploymentManager

public PolicyDeploymentManager getDeploymentManager()

setDeploymentManager

public void setDeploymentManager(PolicyDeploymentManager deploymentManager)

getPolicyResourceConverter

public PolicyResourceConverter getPolicyResourceConverter()

setPolicyResourceConverter

public void setPolicyResourceConverter(PolicyResourceConverter policyResourceConverter)

getPolicyDefinitionCacheLimit

public int getPolicyDefinitionCacheLimit()

setPolicyDefinitionCacheLimit

public void setPolicyDefinitionCacheLimit(int policyDefinitionCacheLimit)

getPolicyDefinitionCache

public org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry> getPolicyDefinitionCache()

setPolicyDefinitionCache

public void setPolicyDefinitionCache(org.flowable.common.engine.impl.persistence.deploy.DeploymentCache<PolicyDefinitionCacheEntry> policyDefinitionCache)

getHistory

public String getHistory()

setHistory

public void setHistory(String history)

getHistoryLevel

public org.flowable.common.engine.impl.history.HistoryLevel getHistoryLevel()

setHistoryLevel

public void setHistoryLevel(org.flowable.common.engine.impl.history.HistoryLevel historyLevel)

start

public void start()

Specified by:

start in interface org.springframework.context.Lifecycle

stop

public void stop()

Specified by:

stop in interface org.springframework.context.Lifecycle

isRunning

public boolean isRunning()

Specified by:

isRunning in interface org.springframework.context.Lifecycle

getPhase

public int getPhase()

Specified by:

getPhase in interface org.flowable.common.spring.SpringEngineConfiguration

Specified by:

getPhase in interface org.springframework.context.Phased

Specified by:

getPhase in interface org.springframework.context.SmartLifecycle

getPolicyRepositoryService

public PolicyRepositoryService getPolicyRepositoryService()

Specified by:

getPolicyRepositoryService in interface PolicyEngineConfigurationApi

setPolicyRepositoryService

public void setPolicyRepositoryService(PolicyRepositoryService policyRepositoryService)

autoDeployResources

protected void autoDeployResources(PolicyEngine policyEngine)

getAutoDeploymentStrategy

protected AutoDeploymentStrategy getAutoDeploymentStrategy(String mode)

Gets the AutoDeploymentStrategy for the provided mode. This method may be overridden to implement custom deployment strategies if required, but implementors should take care not to return null.

Parameters:

mode - the mode to get the strategy for

Returns:

the deployment strategy to use for the mode. Never null