Thomas Vachuska | 02aeb03 | 2015-01-06 22:36:30 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.common.app; |
| 17 | |
| 18 | import com.google.common.collect.ImmutableSet; |
| 19 | import com.google.common.io.ByteStreams; |
| 20 | import com.google.common.io.Files; |
| 21 | import org.apache.commons.configuration.ConfigurationException; |
| 22 | import org.apache.commons.configuration.XMLConfiguration; |
| 23 | import org.onlab.util.Tools; |
| 24 | import org.onosproject.app.ApplicationDescription; |
| 25 | import org.onosproject.app.ApplicationEvent; |
| 26 | import org.onosproject.app.ApplicationException; |
| 27 | import org.onosproject.app.ApplicationStoreDelegate; |
| 28 | import org.onosproject.app.DefaultApplicationDescription; |
| 29 | import org.onosproject.core.Permission; |
| 30 | import org.onosproject.core.Version; |
| 31 | import org.onosproject.store.AbstractStore; |
| 32 | import org.slf4j.Logger; |
| 33 | import org.slf4j.LoggerFactory; |
| 34 | |
| 35 | import java.io.ByteArrayInputStream; |
| 36 | import java.io.File; |
| 37 | import java.io.FileInputStream; |
| 38 | import java.io.FileNotFoundException; |
| 39 | import java.io.IOException; |
| 40 | import java.io.InputStream; |
| 41 | import java.net.URI; |
| 42 | import java.util.Set; |
| 43 | import java.util.zip.ZipEntry; |
| 44 | import java.util.zip.ZipInputStream; |
| 45 | |
| 46 | import static com.google.common.io.ByteStreams.toByteArray; |
| 47 | import static com.google.common.io.Files.createParentDirs; |
| 48 | import static com.google.common.io.Files.write; |
| 49 | |
| 50 | /** |
| 51 | * Facility for reading application archive stream and managing application |
| 52 | * directory structure. |
| 53 | */ |
| 54 | public class ApplicationArchive |
| 55 | extends AbstractStore<ApplicationEvent, ApplicationStoreDelegate> { |
| 56 | |
| 57 | private static final String NAME = "[@name]"; |
| 58 | private static final String ORIGIN = "[@origin]"; |
| 59 | private static final String VERSION = "[@version]"; |
| 60 | private static final String FEATURES_REPO = "[@featuresRepo]"; |
| 61 | private static final String FEATURES = "[@features]"; |
| 62 | private static final String DESCRIPTION = "description"; |
| 63 | |
| 64 | private static Logger log = LoggerFactory.getLogger(ApplicationArchive.class); |
| 65 | private static final String APP_XML = "app.xml"; |
| 66 | private static final String APPS_ROOT = "data/apps/"; |
| 67 | |
| 68 | private File appsDir = new File(APPS_ROOT); |
| 69 | |
| 70 | /** |
| 71 | * Sets the root directory where application artifacts are kept. |
| 72 | * |
| 73 | * @param appsRoot top-level applications directory path |
| 74 | */ |
| 75 | protected void setAppsRoot(String appsRoot) { |
| 76 | this.appsDir = new File(appsRoot); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Returns the root directory where application artifacts are kept. |
| 81 | * |
| 82 | * @return top-level applications directory path |
| 83 | */ |
| 84 | protected String getAppsRoot() { |
| 85 | return appsDir.getPath(); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Returns the set of installed application names. |
| 90 | * |
| 91 | * @return installed application names |
| 92 | */ |
| 93 | public Set<String> getApplicationNames() { |
| 94 | ImmutableSet.Builder<String> names = ImmutableSet.builder(); |
| 95 | File[] files = appsDir.listFiles(File::isDirectory); |
| 96 | if (files != null) { |
| 97 | for (File file : files) { |
| 98 | names.add(file.getName()); |
| 99 | } |
| 100 | } |
| 101 | return names.build(); |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Loads the application descriptor from the specified application archive |
| 106 | * stream and saves the stream in the appropriate application archive |
| 107 | * directory. |
| 108 | * |
| 109 | * @param appName application name |
| 110 | * @return application descriptor |
| 111 | * @throws org.onosproject.app.ApplicationException if unable to read application description |
| 112 | */ |
| 113 | public ApplicationDescription getApplicationDescription(String appName) { |
| 114 | try { |
| 115 | return loadAppDescription(new XMLConfiguration(appFile(appName, APP_XML))); |
| 116 | } catch (Exception e) { |
| 117 | throw new ApplicationException("Unable to get app description", e); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Loads the application descriptor from the specified application archive |
| 123 | * stream and saves the stream in the appropriate application archive |
| 124 | * directory. |
| 125 | * |
| 126 | * @param stream application archive stream |
| 127 | * @return application descriptor |
| 128 | * @throws org.onosproject.app.ApplicationException if unable to read the |
| 129 | * archive stream or store |
| 130 | * the application archive |
| 131 | */ |
| 132 | public ApplicationDescription saveApplication(InputStream stream) { |
| 133 | try (InputStream ais = stream) { |
| 134 | byte[] cache = toByteArray(ais); |
| 135 | InputStream bis = new ByteArrayInputStream(cache); |
| 136 | ApplicationDescription desc = parseAppDescription(bis); |
| 137 | bis.reset(); |
| 138 | |
| 139 | expandApplication(bis, desc); |
| 140 | bis.reset(); |
| 141 | |
| 142 | saveApplication(bis, desc); |
| 143 | installArtifacts(desc); |
| 144 | return desc; |
| 145 | } catch (IOException e) { |
| 146 | throw new ApplicationException("Unable to save application", e); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Purges the application archive directory. |
| 152 | * |
| 153 | * @param appName application name |
| 154 | */ |
| 155 | public void purgeApplication(String appName) { |
| 156 | try { |
| 157 | Tools.removeDirectory(new File(appsDir, appName)); |
| 158 | } catch (IOException e) { |
| 159 | throw new ApplicationException("Unable to purge application " + appName, e); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Returns application archive stream for the specified application. |
| 165 | * |
| 166 | * @param appName application name |
| 167 | * @return application archive stream |
| 168 | */ |
| 169 | public InputStream getApplicationInputStream(String appName) { |
| 170 | try { |
| 171 | return new FileInputStream(appFile(appName, appName + ".zip")); |
| 172 | } catch (FileNotFoundException e) { |
| 173 | throw new ApplicationException("Application " + appName + " not found"); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | // Scans the specified ZIP stream for app.xml entry and parses it producing |
| 178 | // an application descriptor. |
| 179 | private ApplicationDescription parseAppDescription(InputStream stream) |
| 180 | throws IOException { |
| 181 | try (ZipInputStream zis = new ZipInputStream(stream)) { |
| 182 | ZipEntry entry; |
| 183 | while ((entry = zis.getNextEntry()) != null) { |
| 184 | if (entry.getName().equals(APP_XML)) { |
| 185 | byte[] data = new byte[(int) entry.getSize()]; |
| 186 | ByteStreams.readFully(zis, data); |
| 187 | XMLConfiguration cfg = new XMLConfiguration(); |
| 188 | try { |
| 189 | cfg.load(new ByteArrayInputStream(data)); |
| 190 | return loadAppDescription(cfg); |
| 191 | } catch (ConfigurationException e) { |
| 192 | throw new IOException("Unable to parse " + APP_XML, e); |
| 193 | } |
| 194 | } |
| 195 | zis.closeEntry(); |
| 196 | } |
| 197 | } |
| 198 | throw new IOException("Unable to locate " + APP_XML); |
| 199 | } |
| 200 | |
| 201 | private ApplicationDescription loadAppDescription(XMLConfiguration cfg) { |
| 202 | cfg.setAttributeSplittingDisabled(true); |
| 203 | String name = cfg.getString(NAME); |
| 204 | Version version = Version.version(cfg.getString(VERSION)); |
| 205 | String desc = cfg.getString(DESCRIPTION); |
| 206 | String origin = cfg.getString(ORIGIN); |
| 207 | Set<Permission> perms = ImmutableSet.of(); |
| 208 | String featRepo = cfg.getString(FEATURES_REPO); |
| 209 | URI featuresRepo = featRepo != null ? URI.create(featRepo) : null; |
| 210 | Set<String> features = ImmutableSet.copyOf(cfg.getString(FEATURES).split(",")); |
| 211 | |
| 212 | return new DefaultApplicationDescription(name, version, desc, origin, |
| 213 | perms, featuresRepo, features); |
| 214 | } |
| 215 | |
| 216 | // Expands the specified ZIP stream into app-specific directory. |
| 217 | private void expandApplication(InputStream stream, ApplicationDescription desc) |
| 218 | throws IOException { |
| 219 | ZipInputStream zis = new ZipInputStream(stream); |
| 220 | ZipEntry entry; |
| 221 | File appDir = new File(appsDir, desc.name()); |
| 222 | while ((entry = zis.getNextEntry()) != null) { |
| 223 | byte[] data = new byte[(int) entry.getSize()]; |
| 224 | ByteStreams.readFully(zis, data); |
| 225 | zis.closeEntry(); |
| 226 | |
| 227 | File file = new File(appDir, entry.getName()); |
| 228 | createParentDirs(file); |
| 229 | write(data, file); |
| 230 | } |
| 231 | zis.close(); |
| 232 | } |
| 233 | |
| 234 | // Saves the specified ZIP stream into a file under app-specific directory. |
| 235 | private void saveApplication(InputStream stream, ApplicationDescription desc) |
| 236 | throws IOException { |
| 237 | Files.write(toByteArray(stream), appFile(desc.name(), desc.name() + ".zip")); |
| 238 | } |
| 239 | |
| 240 | // Installs application artifacts into M2 repository. |
| 241 | private void installArtifacts(ApplicationDescription desc) { |
| 242 | // FIXME: implement M2 repository copy |
| 243 | } |
| 244 | |
| 245 | protected boolean setActive(String appName) { |
| 246 | try { |
| 247 | return appFile(appName, "active").createNewFile(); |
| 248 | } catch (IOException e) { |
| 249 | throw new ApplicationException("Unable to mark app as active", e); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | protected boolean clearActive(String appName) { |
| 254 | return appFile(appName, "active").delete(); |
| 255 | } |
| 256 | |
| 257 | protected boolean isActive(String appName) { |
| 258 | return appFile(appName, "active").exists(); |
| 259 | } |
| 260 | |
| 261 | |
| 262 | // Returns the name of the file located under the specified app directory. |
| 263 | private File appFile(String appName, String fileName) { |
| 264 | return new File(new File(appsDir, appName), fileName); |
| 265 | } |
| 266 | |
| 267 | } |