com.github.kagkarlsson.scheduler.boot.autoconfigure.DbSchedulerAutoConfiguration Maven / Gradle / Ivy
/*
* Copyright (C) Gustav Karlsson
*
* Licensed 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 com.github.kagkarlsson.scheduler.boot.autoconfigure;
import com.github.kagkarlsson.scheduler.PollingStrategyConfig;
import com.github.kagkarlsson.scheduler.Scheduler;
import com.github.kagkarlsson.scheduler.SchedulerBuilder;
import com.github.kagkarlsson.scheduler.SchedulerName;
import com.github.kagkarlsson.scheduler.boot.config.DbSchedulerCustomizer;
import com.github.kagkarlsson.scheduler.boot.config.DbSchedulerProperties;
import com.github.kagkarlsson.scheduler.boot.config.DbSchedulerStarter;
import com.github.kagkarlsson.scheduler.boot.config.startup.ContextReadyStart;
import com.github.kagkarlsson.scheduler.boot.config.startup.ImmediateStart;
import com.github.kagkarlsson.scheduler.exceptions.SerializationException;
import com.github.kagkarlsson.scheduler.jdbc.AutodetectJdbcCustomization;
import com.github.kagkarlsson.scheduler.serializer.Serializer;
import com.github.kagkarlsson.scheduler.stats.StatsRegistry;
import com.github.kagkarlsson.scheduler.task.OnStartup;
import com.github.kagkarlsson.scheduler.task.Task;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.util.List;
import java.util.Objects;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.AutoConfigurationPackage;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.sql.init.dependency.DependsOnDatabaseInitialization;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.ConfigurableObjectInputStream;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
@Configuration
@EnableConfigurationProperties(DbSchedulerProperties.class)
@AutoConfigurationPackage
@AutoConfigureAfter({
DataSourceAutoConfiguration.class,
})
@ConditionalOnBean(DataSource.class)
@ConditionalOnProperty(value = "db-scheduler.enabled", matchIfMissing = true)
public class DbSchedulerAutoConfiguration {
private static final Logger log = LoggerFactory.getLogger(DbSchedulerAutoConfiguration.class);
private static final Predicate> shouldBeStarted = task -> task instanceof OnStartup;
private final DbSchedulerProperties config;
private final DataSource existingDataSource;
private final List> configuredTasks;
public DbSchedulerAutoConfiguration(
DbSchedulerProperties dbSchedulerProperties,
DataSource dataSource,
List> configuredTasks) {
this.config =
Objects.requireNonNull(
dbSchedulerProperties, "Can't configure db-scheduler without required configuration");
this.existingDataSource =
Objects.requireNonNull(dataSource, "An existing javax.sql.DataSource is required");
this.configuredTasks =
Objects.requireNonNull(configuredTasks, "At least one Task must be configured");
}
/** Provide an empty customizer if not present in the context. */
@ConditionalOnMissingBean
@Bean
public DbSchedulerCustomizer noopCustomizer() {
return new DbSchedulerCustomizer() {};
}
/** Will typically be created if Spring Boot Actuator is not on the classpath. */
@ConditionalOnMissingBean(StatsRegistry.class)
@Bean
StatsRegistry noopStatsRegistry() {
log.debug("Missing StatsRegistry bean in context, creating a no-op StatsRegistry");
return StatsRegistry.NOOP;
}
@ConditionalOnBean(DataSource.class)
@ConditionalOnMissingBean
@DependsOnDatabaseInitialization
@Bean(destroyMethod = "stop")
public Scheduler scheduler(DbSchedulerCustomizer customizer, StatsRegistry registry) {
log.info("Creating db-scheduler using tasks from Spring context: {}", configuredTasks);
// Ensure that we are using a transactional aware data source
DataSource transactionalDataSource = configureDataSource(existingDataSource);
// Instantiate a new builder
final SchedulerBuilder builder =
Scheduler.create(transactionalDataSource, nonStartupTasks(configuredTasks));
builder.threads(config.getThreads());
// Polling
builder.pollingInterval(config.getPollingInterval());
// Polling strategy
if (config.getPollingStrategy() == PollingStrategyConfig.Type.FETCH) {
builder.pollUsingFetchAndLockOnExecute(
config.getPollingStrategyLowerLimitFractionOfThreads(),
config.getPollingStrategyUpperLimitFractionOfThreads());
} else if (config.getPollingStrategy() == PollingStrategyConfig.Type.LOCK_AND_FETCH) {
builder.pollUsingLockAndFetch(
config.getPollingStrategyLowerLimitFractionOfThreads(),
config.getPollingStrategyUpperLimitFractionOfThreads());
} else {
throw new IllegalArgumentException(
"Unknown polling-strategy: " + config.getPollingStrategy());
}
builder.heartbeatInterval(config.getHeartbeatInterval());
// Use scheduler name implementation from customizer if available, otherwise use
// configured scheduler name (String). If both is absent, use the library default
if (customizer.schedulerName().isPresent()) {
builder.schedulerName(customizer.schedulerName().get());
} else if (config.getSchedulerName() != null) {
builder.schedulerName(new SchedulerName.Fixed(config.getSchedulerName()));
}
builder.tableName(config.getTableName());
// Use custom serializer if provided. Otherwise use devtools friendly serializer.
builder.serializer(customizer.serializer().orElse(SPRING_JAVA_SERIALIZER));
// Use custom JdbcCustomizer if provided.
builder.jdbcCustomization(
customizer
.jdbcCustomization()
.orElse(new AutodetectJdbcCustomization(transactionalDataSource)));
if (config.isImmediateExecutionEnabled()) {
builder.enableImmediateExecution();
}
// Use custom executor service if provided
customizer.executorService().ifPresent(builder::executorService);
// Use custom due executor if provided
customizer.dueExecutor().ifPresent(builder::dueExecutor);
// Use housekeeper executor service if provided
customizer.housekeeperExecutor().ifPresent(builder::housekeeperExecutor);
builder.deleteUnresolvedAfter(config.getDeleteUnresolvedAfter());
// Add recurring jobs and jobs that implements OnStartup
builder.startTasks(startupTasks(configuredTasks));
// Expose metrics
builder.statsRegistry(registry);
// Failure logging
builder.failureLogging(config.getFailureLoggerLevel(), config.isFailureLoggerLogStackTrace());
// Shutdown max wait
builder.shutdownMaxWait(config.getShutdownMaxWait());
return builder.build();
}
@ConditionalOnBean(Scheduler.class)
@ConditionalOnMissingBean
@Bean
public DbSchedulerStarter dbSchedulerStarter(Scheduler scheduler) {
if (config.isDelayStartupUntilContextReady()) {
return new ContextReadyStart(scheduler);
}
return new ImmediateStart(scheduler);
}
private static DataSource configureDataSource(DataSource existingDataSource) {
if (existingDataSource instanceof TransactionAwareDataSourceProxy) {
log.debug("Using an already transaction aware DataSource");
return existingDataSource;
}
log.debug(
"The configured DataSource is not transaction aware: '{}'. Wrapping in TransactionAwareDataSourceProxy.",
existingDataSource);
return new TransactionAwareDataSourceProxy(existingDataSource);
}
@SuppressWarnings("unchecked")
private static & OnStartup> List startupTasks(List> tasks) {
return tasks.stream()
.filter(shouldBeStarted)
.map(task -> (T) task)
.collect(Collectors.toList());
}
private static List> nonStartupTasks(List> tasks) {
return tasks.stream().filter(shouldBeStarted.negate()).collect(Collectors.toList());
}
/**
* {@link Serializer} compatible with Spring Boot Devtools.
*
* @see
* Devtools known limitations
*/
private static final Serializer SPRING_JAVA_SERIALIZER =
new Serializer() {
public byte[] serialize(Object data) {
if (data == null) return null;
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput out = new ObjectOutputStream(bos)) {
out.writeObject(data);
return bos.toByteArray();
} catch (Exception e) {
throw new SerializationException("Failed to serialize object", e);
}
}
public T deserialize(Class clazz, byte[] serializedData) {
if (serializedData == null) return null;
try (ByteArrayInputStream bis = new ByteArrayInputStream(serializedData);
ObjectInput in =
new ConfigurableObjectInputStream(
bis, Thread.currentThread().getContextClassLoader())) {
return clazz.cast(in.readObject());
} catch (Exception e) {
throw new SerializationException("Failed to deserialize object", e);
}
}
};
}