| 1 | package org.dcache.boot; |
| 2 | |
| 3 | import java.io.BufferedReader; |
| 4 | import java.io.IOException; |
| 5 | import java.io.InputStreamReader; |
| 6 | import java.io.LineNumberReader; |
| 7 | import java.io.PrintStream; |
| 8 | import java.io.StringReader; |
| 9 | import java.net.URI; |
| 10 | import java.net.URISyntaxException; |
| 11 | import java.net.URL; |
| 12 | import java.util.Collection; |
| 13 | import java.util.Collections; |
| 14 | import java.util.LinkedHashMap; |
| 15 | import java.util.Map; |
| 16 | import java.util.Properties; |
| 17 | import java.util.Set; |
| 18 | import java.util.regex.Matcher; |
| 19 | import java.util.regex.Pattern; |
| 20 | |
| 21 | import org.dcache.util.DeprecatableProperties; |
| 22 | import org.dcache.util.NetworkUtils; |
| 23 | import org.dcache.util.ReplaceableProperties; |
| 24 | import org.dcache.commons.util.Strings; |
| 25 | |
| 26 | /** |
| 27 | * Layout encapsulates the configuration of a set of domains. |
| 28 | */ |
| 29 | public class Layout |
| 30 | { |
| 31 | private static final int READ_AHEAD_LIMIT = 256; |
| 32 | |
| 33 | private static final Pattern SECTION_HEADER = |
| 34 | Pattern.compile("^\\s*\\[([^\\]/]+)(/([^\\]/]+))?\\]\\s*$"); |
| 35 | |
| 36 | private static final String PROPERTY_DOMAINS = |
| 37 | "dcache.domains"; |
| 38 | |
| 39 | private final ReplaceableProperties _properties; |
| 40 | private final Map<String,Domain> _domains = |
| 41 | new LinkedHashMap<String,Domain>(); |
| 42 | |
| 43 | public Layout(ReplaceableProperties config) |
| 44 | { |
| 45 | _properties = new DeprecatableProperties(config); |
| 46 | } |
| 47 | |
| 48 | public ReplaceableProperties properties() |
| 49 | { |
| 50 | return _properties; |
| 51 | } |
| 52 | |
| 53 | public Collection<Domain> getDomains() |
| 54 | { |
| 55 | return Collections.unmodifiableCollection(_domains.values()); |
| 56 | } |
| 57 | |
| 58 | public Domain getDomain(String name) |
| 59 | { |
| 60 | return _domains.get(name); |
| 61 | } |
| 62 | |
| 63 | public Domain createDomain(String name) |
| 64 | { |
| 65 | Domain domain = _domains.get(name); |
| 66 | if (domain == null) { |
| 67 | domain = new Domain(name, _properties); |
| 68 | _domains.put(name, domain); |
| 69 | _properties.put(PROPERTY_DOMAINS, |
| 70 | Strings.join(_domains.keySet(), " ")); |
| 71 | } |
| 72 | return domain; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Reads a layout definition from the URI. |
| 77 | * |
| 78 | * @param uri The URI of the layout definition. |
| 79 | */ |
| 80 | public void load(URI uri) |
| 81 | throws URISyntaxException, IOException |
| 82 | { |
| 83 | URL url = NetworkUtils.toURL(uri); |
| 84 | LineNumberReader reader = |
| 85 | new LineNumberReader(new InputStreamReader(url.openStream())); |
| 86 | try { |
| 87 | load(reader); |
| 88 | } catch (IllegalArgumentException e) { |
| 89 | throw new IllegalArgumentException(String.format("%s, line %d: %s", uri, reader.getLineNumber(), e.getMessage()), e); |
| 90 | } catch (IOException e) { |
| 91 | throw new IOException(String.format("%s, line %d: %s", uri, reader.getLineNumber(), e.getMessage()), e); |
| 92 | } catch (RuntimeException e) { |
| 93 | throw new RuntimeException(String.format("%s, line %d: %s", uri, reader.getLineNumber(), e.getMessage()), e); |
| 94 | } finally { |
| 95 | reader.close(); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Reads a layout definition from the input character stream. |
| 101 | * |
| 102 | * @param reader the input character stream. |
| 103 | */ |
| 104 | public void load(BufferedReader reader) |
| 105 | throws IOException |
| 106 | { |
| 107 | loadSection(reader, _properties); |
| 108 | |
| 109 | String s; |
| 110 | while ((s = reader.readLine()) != null) { |
| 111 | Matcher matcher = SECTION_HEADER.matcher(s); |
| 112 | if (!matcher.matches()) { |
| 113 | throw new RuntimeException("Bug detected: Section header expected: " + s); |
| 114 | } |
| 115 | |
| 116 | String domainName = |
| 117 | _properties.replaceKeywords(matcher.group(1)); |
| 118 | String serviceName = |
| 119 | matcher.group(3); |
| 120 | |
| 121 | if (serviceName == null) { |
| 122 | Domain domain = createDomain(domainName); |
| 123 | loadSection(reader, domain.properties()); |
| 124 | } else { |
| 125 | Domain domain = getDomain(domainName); |
| 126 | if (domain == null) { |
| 127 | throw new IllegalArgumentException(String.format("Service declaration %s/%s lacks definition of domain %s", domainName, serviceName, domainName)); |
| 128 | } |
| 129 | loadSection(reader, domain.createService(serviceName)); |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Reads properties until the next section header. The position is |
| 136 | * advanced until the next section header or the end of file. |
| 137 | * |
| 138 | * @param reader The reader to read from |
| 139 | * @param config The Properties to which to add the properties |
| 140 | */ |
| 141 | private void loadSection(BufferedReader reader, Properties config) |
| 142 | throws IOException |
| 143 | { |
| 144 | String s; |
| 145 | StringBuilder section = new StringBuilder(); |
| 146 | reader.mark(READ_AHEAD_LIMIT); |
| 147 | while ( (s = reader.readLine()) != null && |
| 148 | !SECTION_HEADER.matcher(s).matches()) { |
| 149 | section.append(s).append('\n'); |
| 150 | reader.mark(READ_AHEAD_LIMIT); |
| 151 | } |
| 152 | reader.reset(); |
| 153 | config.load(new StringReader(section.toString())); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Prints the list of domains in the layout. |
| 158 | */ |
| 159 | public void printDomainNames(PrintStream out) |
| 160 | { |
| 161 | for (Domain domain: _domains.values()) { |
| 162 | out.println(domain.getName()); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Prints the domains in the layout matching one of the |
| 168 | * patterns. |
| 169 | */ |
| 170 | public void printMatchingDomainNames(PrintStream out, Collection<Pattern> patterns) |
| 171 | { |
| 172 | for (Domain domain: _domains.values()) { |
| 173 | for (Pattern pattern: patterns) { |
| 174 | String name = domain.getName(); |
| 175 | if (pattern.matcher(name).matches()) { |
| 176 | out.println(name); |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | } |