dubbo ServiceRestMetadataStorage 源码
dubbo ServiceRestMetadataStorage 代码
文件路径：/dubbo-metadata/dubbo-metadata-processor/src/main/java/org/apache/dubbo/metadata/annotation/processing/rest/ServiceRestMetadataStorage.java
/*
* 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.dubbo.metadata.annotation.processing.rest;
import org.apache.dubbo.common.utils.JsonUtils;
import org.apache.dubbo.metadata.annotation.processing.ClassPathMetadataStorage;
import org.apache.dubbo.metadata.rest.ServiceRestMetadata;
import javax.annotation.processing.ProcessingEnvironment;
import java.io.IOException;
import java.util.Set;
import static org.apache.dubbo.metadata.rest.RestMetadataConstants.SERVICE_REST_METADATA_RESOURCE_PATH;
/**
* The storage for {@link ServiceRestMetadata}
*/
public class ServiceRestMetadataStorage {
private final ClassPathMetadataStorage storage;
public ServiceRestMetadataStorage(ProcessingEnvironment processingEnv) {
this.storage = new ClassPathMetadataStorage(processingEnv);
}
public void append(Set<ServiceRestMetadata> serviceRestMetadata) throws IOException {
// Add all existed ServiceRestMetadata
storage.read(SERVICE_REST_METADATA_RESOURCE_PATH, reader -> {
try {
StringBuilder stringBuilder = new StringBuilder();
char[] buf = new char[1024];
int len;
while ((len = reader.read(buf)) != -1) {
stringBuilder.append(buf, 0, len);
}
return JsonUtils.getJson().toJavaList(stringBuilder.toString(), ServiceRestMetadata.class);
} catch (IOException e) {
return null;
}
}).ifPresent(serviceRestMetadata::addAll);
write(serviceRestMetadata);
}
public void write(Set<ServiceRestMetadata> serviceRestMetadata) throws IOException {
if (serviceRestMetadata.isEmpty()) {
return;
}
storage.write(() -> JsonUtils.getJson().toJson(serviceRestMetadata), SERVICE_REST_METADATA_RESOURCE_PATH);
}
}
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