public boolean initializeUpgrade() throws IOException { currentUpgrades = getDistributedUpgrades(); if (currentUpgrades == null) { // set new upgrade state setUpgradeState(false, FSConstants.LAYOUT_VERSION); return false; } Upgradeable curUO = currentUpgrades.first(); // set and write new upgrade state into disk setUpgradeState(true, curUO.getVersion()); return true; }
UOSignature(Upgradeable uo) { this.version = uo.getVersion(); this.type = uo.getType(); this.className = uo.getClass().getCanonicalName(); }