/
ConfigCenterBasedMetadataReportFactory.java
90 lines (79 loc) · 3.57 KB
/
ConfigCenterBasedMetadataReportFactory.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
/*
* 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.report.support;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.config.configcenter.DynamicConfiguration;
import org.apache.dubbo.metadata.report.MetadataReport;
import org.apache.dubbo.metadata.report.MetadataReportFactory;
import org.apache.dubbo.metadata.report.identifier.KeyTypeEnum;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static org.apache.dubbo.common.config.configcenter.TreePathDynamicConfiguration.CONFIG_ROOT_PATH_PARAM_NAME;
import static org.apache.dubbo.common.utils.StringUtils.SLASH;
import static org.apache.dubbo.common.utils.StringUtils.isBlank;
import static org.apache.dubbo.metadata.report.identifier.KeyTypeEnum.PATH;
import static org.apache.dubbo.rpc.cluster.Constants.EXPORT_KEY;
import static org.apache.dubbo.rpc.cluster.Constants.REFER_KEY;
/**
* The abstract implementation of {@link MetadataReportFactory} based on
* {@link DynamicConfiguration the config-center infrastructure}
*
* @see MetadataReportFactory
* @see MetadataReport
* @see DynamicConfiguration
* @since 2.7.8
*/
public abstract class ConfigCenterBasedMetadataReportFactory implements MetadataReportFactory {
/**
* org.apache.dubbo.metadata.report.MetadataReport
*/
private static final String URL_PATH = MetadataReport.class.getName();
// Registry Collection Map<metadataAddress, MetadataReport>
private static final Map<String, ConfigCenterBasedMetadataReport> metadataReportCache = new ConcurrentHashMap();
private final KeyTypeEnum keyType;
public ConfigCenterBasedMetadataReportFactory(KeyTypeEnum keyType) {
if (keyType == null) {
throw new NullPointerException("The keyType argument must not be null!");
}
this.keyType = keyType;
}
@Override
public ConfigCenterBasedMetadataReport getMetadataReport(URL url) {
url = url.setPath(URL_PATH);
final URL actualURL = resolveURLParameters(url);
String key = actualURL.toServiceString();
// Lock the metadata access process to ensure a single instance of the metadata instance
return metadataReportCache.computeIfAbsent(key, k -> new ConfigCenterBasedMetadataReport(actualURL, keyType));
}
private URL resolveURLParameters(URL url) {
URL resolvedURL = url.removeParameters(EXPORT_KEY, REFER_KEY);
if (PATH.equals(getKeyType())) { // Only handles for "PATH" type
if (isBlank(resolvedURL.getParameter(CONFIG_ROOT_PATH_PARAM_NAME))) {
resolvedURL = resolvedURL.addParameter(CONFIG_ROOT_PATH_PARAM_NAME, SLASH);
}
}
return resolvedURL;
}
/**
* Get {@link KeyTypeEnum the key type}
*
* @return non-null
*/
protected KeyTypeEnum getKeyType() {
return keyType;
}
}