我曾在开发FlexyPool时遇到过同样的问题,这就是我所做的。
基本上,从以下构建器开始:
public final class Configuration<T extends DataSource> extends ConfigurationProperties<T, Metrics, PoolAdapter<T>> {
public static final long DEFAULT_METRIC_LOG_REPORTER_PERIOD = 5;
public static class Builder<T extends DataSource> {
private final String uniqueName;
private final T targetDataSource;
private final PoolAdapterBuilder<T> poolAdapterBuilder;
private final MetricsBuilder metricsBuilder;
private boolean jmxEnabled = true;
private long metricLogReporterPeriod = DEFAULT_METRIC_LOG_REPORTER_PERIOD;
public Builder(String uniqueName, T targetDataSource, MetricsBuilder metricsBuilder, PoolAdapterBuilder<T> poolAdapterBuilder) {
this.uniqueName = uniqueName;
this.targetDataSource = targetDataSource;
this.metricsBuilder = metricsBuilder;
this.poolAdapterBuilder = poolAdapterBuilder;
}
public Builder setJmxEnabled(boolean enableJmx) {
this.jmxEnabled = enableJmx;
return this;
}
public Builder setMetricLogReporterPeriod(long metricLogReporterPeriod) {
this.metricLogReporterPeriod = metricLogReporterPeriod;
return this;
}
public Configuration<T> build() {
Configuration<T> configuration = new Configuration<T>(uniqueName, targetDataSource);
configuration.setJmxEnabled(jmxEnabled);
configuration.setMetricLogReporterPeriod(metricLogReporterPeriod);
configuration.metrics = metricsBuilder.build(configuration);
configuration.poolAdapter = poolAdapterBuilder.build(configuration);
return configuration;
}
}
private final T targetDataSource;
private Metrics metrics;
private PoolAdapter poolAdapter;
private Configuration(String uniqueName, T targetDataSource) {
super(uniqueName);
this.targetDataSource = targetDataSource;
}
public T getTargetDataSource() {
return targetDataSource;
}
public Metrics getMetrics() {
return metrics;
}
public PoolAdapter<T> getPoolAdapter() {
return poolAdapter;
}
}
使用基于Java的配置很简单:
@org.springframework.context.annotation.Configuration
public class FlexyDataSourceConfiguration {
@Bean
public Configuration configuration() {
return new Configuration.Builder(
UUID.randomUUID().toString(),
poolingDataSource,
CodahaleMetrics.BUILDER,
BitronixPoolAdapter.BUILDER
).build();
}
}
但是你也可以使用基于XML的配置:
<bean id="configurationBuilder" class="com.vladmihalcea.flexypool.config.Configuration$Builder">
<constructor-arg value="uniqueId"/>
<constructor-arg ref="poolingDataSource"/>
<constructor-arg value="#{ T(com.vladmihalcea.flexypool.metric.codahale.CodahaleMetrics).BUILDER }"/>
<constructor-arg value="#{ T(com.vladmihalcea.flexypool.adaptor.BitronixPoolAdapter).BUILDER }"/>
</bean>
<bean id="configuration" factory-bean="configurationBuilder" factory-method="build"/>
setJmxEnabled
或setMetricLogReporterPeriod
,只使用了构建器构造函数。 - Krease