mobile/android/base/sync/synchronizer/SerialRecordConsumer.java@fc2d59ddac77 (annotated)
mobile/android/base/sync/synchronizer/SerialRecordConsumer.java
Wed, 31 Dec 2014 07:22:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:22:50 +0100
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
- permissions
- -rw-r--r--
Correct previous dual key logic pending first delivery installment.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | package org.mozilla.gecko.sync.synchronizer; |
| michael@0 | 6 | |
| michael@0 | 7 | import org.mozilla.gecko.background.common.log.Logger; |
| michael@0 | 8 | import org.mozilla.gecko.sync.repositories.domain.Record; |
| michael@0 | 9 | |
| michael@0 | 10 | /** |
| michael@0 | 11 | * Consume records from a queue inside a RecordsChannel, storing them serially. |
| michael@0 | 12 | * @author rnewman |
| michael@0 | 13 | * |
| michael@0 | 14 | */ |
| michael@0 | 15 | class SerialRecordConsumer extends RecordConsumer { |
| michael@0 | 16 | private static final String LOG_TAG = "SerialRecordConsumer"; |
| michael@0 | 17 | protected boolean stopEventually = false; |
| michael@0 | 18 | private volatile long counter = 0; |
| michael@0 | 19 | |
| michael@0 | 20 | public SerialRecordConsumer(RecordsConsumerDelegate delegate) { |
| michael@0 | 21 | this.delegate = delegate; |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | private Object monitor = new Object(); |
| michael@0 | 25 | @Override |
| michael@0 | 26 | public void doNotify() { |
| michael@0 | 27 | synchronized (monitor) { |
| michael@0 | 28 | monitor.notify(); |
| michael@0 | 29 | } |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | @Override |
| michael@0 | 33 | public void queueFilled() { |
| michael@0 | 34 | Logger.debug(LOG_TAG, "Queue filled."); |
| michael@0 | 35 | synchronized (monitor) { |
| michael@0 | 36 | this.stopEventually = true; |
| michael@0 | 37 | monitor.notify(); |
| michael@0 | 38 | } |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | @Override |
| michael@0 | 42 | public void halt() { |
| michael@0 | 43 | Logger.debug(LOG_TAG, "Halting."); |
| michael@0 | 44 | synchronized (monitor) { |
| michael@0 | 45 | this.stopEventually = true; |
| michael@0 | 46 | this.stopImmediately = true; |
| michael@0 | 47 | monitor.notify(); |
| michael@0 | 48 | } |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | private Object storeSerializer = new Object(); |
| michael@0 | 52 | @Override |
| michael@0 | 53 | public void stored() { |
| michael@0 | 54 | Logger.debug(LOG_TAG, "Record stored. Notifying."); |
| michael@0 | 55 | synchronized (storeSerializer) { |
| michael@0 | 56 | Logger.debug(LOG_TAG, "stored() took storeSerializer."); |
| michael@0 | 57 | counter++; |
| michael@0 | 58 | storeSerializer.notify(); |
| michael@0 | 59 | Logger.debug(LOG_TAG, "stored() dropped storeSerializer."); |
| michael@0 | 60 | } |
| michael@0 | 61 | } |
| michael@0 | 62 | private void storeSerially(Record record) { |
| michael@0 | 63 | Logger.debug(LOG_TAG, "New record to store."); |
| michael@0 | 64 | synchronized (storeSerializer) { |
| michael@0 | 65 | Logger.debug(LOG_TAG, "storeSerially() took storeSerializer."); |
| michael@0 | 66 | Logger.debug(LOG_TAG, "Storing..."); |
| michael@0 | 67 | try { |
| michael@0 | 68 | this.delegate.store(record); |
| michael@0 | 69 | } catch (Exception e) { |
| michael@0 | 70 | Logger.warn(LOG_TAG, "Got exception in store. Not waiting.", e); |
| michael@0 | 71 | return; // So we don't block for a stored() that never comes. |
| michael@0 | 72 | } |
| michael@0 | 73 | try { |
| michael@0 | 74 | Logger.debug(LOG_TAG, "Waiting..."); |
| michael@0 | 75 | storeSerializer.wait(); |
| michael@0 | 76 | } catch (InterruptedException e) { |
| michael@0 | 77 | // TODO |
| michael@0 | 78 | } |
| michael@0 | 79 | Logger.debug(LOG_TAG, "storeSerially() dropped storeSerializer."); |
| michael@0 | 80 | } |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | private void consumerIsDone() { |
| michael@0 | 84 | long counterNow = this.counter; |
| michael@0 | 85 | Logger.info(LOG_TAG, "Consumer is done. Processed " + counterNow + ((counterNow == 1) ? " record." : " records.")); |
| michael@0 | 86 | delegate.consumerIsDone(stopImmediately); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | @Override |
| michael@0 | 90 | public void run() { |
| michael@0 | 91 | while (true) { |
| michael@0 | 92 | synchronized (monitor) { |
| michael@0 | 93 | Logger.debug(LOG_TAG, "run() took monitor."); |
| michael@0 | 94 | if (stopImmediately) { |
| michael@0 | 95 | Logger.debug(LOG_TAG, "Stopping immediately. Clearing queue."); |
| michael@0 | 96 | delegate.getQueue().clear(); |
| michael@0 | 97 | Logger.debug(LOG_TAG, "Notifying consumer."); |
| michael@0 | 98 | consumerIsDone(); |
| michael@0 | 99 | return; |
| michael@0 | 100 | } |
| michael@0 | 101 | Logger.debug(LOG_TAG, "run() dropped monitor."); |
| michael@0 | 102 | } |
| michael@0 | 103 | // The queue is concurrent-safe. |
| michael@0 | 104 | while (!delegate.getQueue().isEmpty()) { |
| michael@0 | 105 | Logger.debug(LOG_TAG, "Grabbing record..."); |
| michael@0 | 106 | Record record = delegate.getQueue().remove(); |
| michael@0 | 107 | // Block here, allowing us to process records |
| michael@0 | 108 | // serially. |
| michael@0 | 109 | Logger.debug(LOG_TAG, "Invoking storeSerially..."); |
| michael@0 | 110 | this.storeSerially(record); |
| michael@0 | 111 | Logger.debug(LOG_TAG, "Done with record."); |
| michael@0 | 112 | } |
| michael@0 | 113 | synchronized (monitor) { |
| michael@0 | 114 | Logger.debug(LOG_TAG, "run() took monitor."); |
| michael@0 | 115 | |
| michael@0 | 116 | if (stopEventually) { |
| michael@0 | 117 | Logger.debug(LOG_TAG, "Done with records and told to stop. Notifying consumer."); |
| michael@0 | 118 | consumerIsDone(); |
| michael@0 | 119 | return; |
| michael@0 | 120 | } |
| michael@0 | 121 | try { |
| michael@0 | 122 | Logger.debug(LOG_TAG, "Not told to stop but no records. Waiting."); |
| michael@0 | 123 | monitor.wait(10000); |
| michael@0 | 124 | } catch (InterruptedException e) { |
| michael@0 | 125 | // TODO |
| michael@0 | 126 | } |
| michael@0 | 127 | Logger.debug(LOG_TAG, "run() dropped monitor."); |
| michael@0 | 128 | } |
| michael@0 | 129 | } |
| michael@0 | 130 | } |
| michael@0 | 131 | } |
