io.polaris.core.service.Service Maven / Gradle / Ivy
package io.polaris.core.service;
import lombok.AccessLevel;
import lombok.Getter;
import java.util.Comparator;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
/**
* @author Qt
* @since 1.8
*/
public class Service {
@SuppressWarnings("rawtypes")
static final Comparator defaultComparator = (a, b) -> {
if (Objects.equals(a, b)) {
return 0;
}
int rs = Integer.compare(a.order, b.order);
if (rs == 0) {
rs = a.serviceClass.getName().compareTo(b.serviceClass.getName());
}
return rs;
};
@Getter
private final Class serviceClass;
@Getter
private final String serviceName;
@Getter(AccessLevel.PACKAGE)
private final int order;
private final Map properties;
private volatile S singletonPure;
private volatile S singleton;
private Function wrapperBuilder;
Service(final Class serviceClass, Map properties, final String serviceName, final int order, Function wrapperBuilder) {
this.serviceClass = serviceClass;
this.serviceName = serviceName;
this.order = order;
this.properties = properties;
this.wrapperBuilder = wrapperBuilder;
}
public String getProperty(String name) {
return properties == null ? null : properties.get(name);
}
private void build() {
singletonPure = newPureInstance();
singleton = wrapperBuilder == null ? singletonPure : wrapperBuilder.apply(singletonPure);
}
public S getPureSingleton() {
if (singletonPure == null) {
synchronized (this) {
if (singletonPure == null) {
build();
}
}
}
return singletonPure;
}
public S getSingleton() {
if (singleton == null) {
synchronized (this) {
if (singleton == null) {
build();
}
}
}
return singleton;
}
public S newInstance() {
return wrapperBuilder == null ? newPureInstance() : wrapperBuilder.apply(newPureInstance());
}
public S newInstance(Class[] parameterTypes, Object[] args) {
return wrapperBuilder == null ? newPureInstance(parameterTypes, args) : wrapperBuilder.apply(newPureInstance(parameterTypes, args));
}
public S newPureInstance() {
try {
return serviceClass.newInstance();
} catch (ReflectiveOperationException e) {
throw new IllegalStateException("创建实例失败", e);
}
}
public S newPureInstance(Class[] parameterTypes, Object[] args) {
try {
return serviceClass.getConstructor(parameterTypes).newInstance(args);
} catch (ReflectiveOperationException e) {
throw new IllegalStateException("创建实例失败", e);
}
}
@Override
public String toString() {
return "Service{" +
"serviceClass=" + serviceClass.getName() +
", serviceName=" + serviceName +
", properties=" + properties +
'}';
}
}