1 files changed, 149 insertions, 0 deletions
diff --git a/config-model-api/src/main/java/com/yahoo/config/application/api/ApplicationMetaData.java b/config-model-api/src/main/java/com/yahoo/config/application/api/ApplicationMetaData.java
new file mode 100644
index 00000000000..98d5fa92cac
--- /dev/null
+++ b/config-model-api/src/main/java/com/yahoo/config/application/api/ApplicationMetaData.java
@@ -0,0 +1,149 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.config.application.api;
+
+import com.yahoo.slime.*;
+
+import com.yahoo.text.Utf8;
+
+import java.io.*;
+
+/**
+ * Metadata about an application package.
+ *
+ * @author musum
+ * @since 5.0
+ */
+public class ApplicationMetaData {
+    private final String deployedByUser;
+    private final String deployedFromDir;
+    private final long deployTimestamp;
+    private final long generation;
+    private final long previousActiveGeneration;
+    private final String checkSum;
+    private final String appName;
+
+    public ApplicationMetaData(File appDir, String deployedByUser, String deployedFromDir, Long deployTimestamp,
+                               String checkSum, Long generation, long previousActiveGeneration) {
+        this(deployedByUser, deployedFromDir, deployTimestamp, appDir.getName(), checkSum, generation, previousActiveGeneration);
+    }
+
+    public ApplicationMetaData(String deployedByUser, String deployedFromDir, Long deployTimestamp, String applicationName, String checkSum, Long generation, long previousActiveGeneration) {
+        this.appName = applicationName;
+        this.deployedByUser = deployedByUser;
+        this.deployedFromDir = deployedFromDir;
+        this.deployTimestamp = deployTimestamp;
+        this.checkSum = checkSum;
+        this.generation = generation;
+        this.previousActiveGeneration = previousActiveGeneration;
+    }
+
+    /**
+     * Gets the name of the application (name of the directory from which application was deployed.
+     * Will return null if a problem occurred while getting metadata
+     *
+     * @return application name
+     */
+    public String getApplicationName() {
+        return appName;
+    }
+
+    /**
+     * Gets the user who deployed the application.
+     * Will return null if a problem occurred while getting metadata
+     *
+     * @return user name for the user who ran "deploy-application"
+     */
+    public String getDeployedByUser() {
+        return deployedByUser;
+    }
+
+    /**
+     * Gets the directory where the application was deployed from.
+     * Will return null if a problem occurred while getting metadata
+     *
+     * @return path to raw deploy directory (for the original application)
+     */
+    public String getDeployPath() {
+        return deployedFromDir;
+    }
+
+    /**
+     * Gets the time the application was deployed
+     * Will return null if a problem occurred while getting metadata
+     *
+     * @return timestamp for when "deploy-application" was run. In ms.
+     */
+    public Long getDeployTimestamp() {
+            return deployTimestamp;
+    }
+
+    /**
+     * Gets the time the application was deployed
+     * Will return null if a problem occurred while getting metadata
+     *
+     * @return timestamp for when "deploy-application" was run. In ms.
+     */
+    public Long getGeneration() {
+            return generation;
+    }
+
+    /**
+     * Returns an md5 hash of the contents of the application package
+     * @return an md5sum of the application package
+     */
+    public String getCheckSum() {
+        return checkSum;
+    }
+
+    /**
+     * Returns the previously active generation at the point when this application was created.
+     * @return a generation.
+     */
+    public long getPreviousActiveGeneration() {
+        return previousActiveGeneration;
+    }
+
+    @Override
+    public String toString() {
+        return deployedByUser + ", " + deployedFromDir + ", " + deployTimestamp + ", " + generation + ", " + checkSum + ", " + previousActiveGeneration;
+    }
+
+    public static ApplicationMetaData fromJsonString(String jsonString) {
+        try {
+            Slime data = new Slime();
+            new JsonDecoder().decode(data, Utf8.toBytes(jsonString));
+            Inspector root = data.get();
+            Inspector deploy = root.field("deploy");
+            Inspector app = root.field("application");
+            return new ApplicationMetaData(deploy.field("user").asString(), deploy.field("from").asString(), deploy.field("timestamp").asLong(), app.field("name").asString(), app.field("checksum").asString(), app.field("generation").asLong(), app.field("previousActiveGeneration").asLong());
+        } catch (Exception e) {
+            throw new IllegalArgumentException("Error parsing json metadata", e);
+        }
+    }
+
+    public Slime getSlime() {
+        Slime slime = new Slime();
+        Cursor meta = slime.setObject();
+        Cursor deploy = meta.setObject("deploy");
+        deploy.setString("user", deployedByUser);
+        deploy.setString("from", deployedFromDir);
+        deploy.setLong("timestamp", deployTimestamp);
+        Cursor app = meta.setObject("application");
+        app.setString("name", appName);
+        app.setString("checksum", checkSum);
+        app.setLong("generation", generation);
+        app.setLong("previousActiveGeneration", previousActiveGeneration);
+        return slime;
+    }
+
+    public String asJsonString() {
+        Slime slime = getSlime();
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try {
+            new JsonFormat(false).encode(baos, slime);
+            return baos.toString("UTF-8");
+        } catch (IOException e) {
+            throw new RuntimeException("Unable to encode metadata", e);
+        }
+    }
+}