| 1 | |
package com.ctrip.apollo.internals; |
| 2 | |
|
| 3 | |
import com.google.common.base.Objects; |
| 4 | |
import com.google.common.collect.Lists; |
| 5 | |
import com.google.common.collect.Sets; |
| 6 | |
|
| 7 | |
import com.ctrip.apollo.Config; |
| 8 | |
import com.ctrip.apollo.ConfigChangeListener; |
| 9 | |
import com.ctrip.apollo.enums.PropertyChangeType; |
| 10 | |
import com.ctrip.apollo.model.ConfigChange; |
| 11 | |
import com.ctrip.apollo.model.ConfigChangeEvent; |
| 12 | |
import com.dianping.cat.Cat; |
| 13 | |
|
| 14 | |
import org.slf4j.Logger; |
| 15 | |
import org.slf4j.LoggerFactory; |
| 16 | |
|
| 17 | |
import java.util.List; |
| 18 | |
import java.util.Properties; |
| 19 | |
import java.util.Set; |
| 20 | |
|
| 21 | |
|
| 22 | |
|
| 23 | |
|
| 24 | 20 | public abstract class AbstractConfig implements Config { |
| 25 | 1 | private static final Logger logger = LoggerFactory.getLogger(AbstractConfig.class); |
| 26 | 20 | private List<ConfigChangeListener> m_listeners = Lists.newCopyOnWriteArrayList(); |
| 27 | |
|
| 28 | |
@Override |
| 29 | |
public void addChangeListener(ConfigChangeListener listener) { |
| 30 | 4 | if (!m_listeners.contains(listener)) { |
| 31 | 4 | m_listeners.add(listener); |
| 32 | |
} |
| 33 | 4 | } |
| 34 | |
|
| 35 | |
@Override |
| 36 | |
public Integer getIntProperty(String key, Integer defaultValue) { |
| 37 | 0 | String value = getProperty(key, null); |
| 38 | 0 | return value == null ? defaultValue : Integer.parseInt(value); |
| 39 | |
} |
| 40 | |
|
| 41 | |
@Override |
| 42 | |
public Long getLongProperty(String key, Long defaultValue) { |
| 43 | 0 | String value = getProperty(key, null); |
| 44 | 0 | return value == null ? defaultValue : Long.parseLong(value); |
| 45 | |
} |
| 46 | |
|
| 47 | |
@Override |
| 48 | |
public Short getShortProperty(String key, Short defaultValue) { |
| 49 | 0 | String value = getProperty(key, null); |
| 50 | 0 | return value == null ? defaultValue : Short.parseShort(value); |
| 51 | |
} |
| 52 | |
|
| 53 | |
@Override |
| 54 | |
public Float getFloatProperty(String key, Float defaultValue) { |
| 55 | 0 | String value = getProperty(key, null); |
| 56 | 0 | return value == null ? defaultValue : Float.parseFloat(value); |
| 57 | |
} |
| 58 | |
|
| 59 | |
@Override |
| 60 | |
public Double getDoubleProperty(String key, Double defaultValue) { |
| 61 | 0 | String value = getProperty(key, null); |
| 62 | 0 | return value == null ? defaultValue : Double.parseDouble(value); |
| 63 | |
} |
| 64 | |
|
| 65 | |
@Override |
| 66 | |
public Byte getByteProperty(String key, Byte defaultValue) { |
| 67 | 0 | String value = getProperty(key, null); |
| 68 | 0 | return value == null ? defaultValue : Byte.parseByte(value); |
| 69 | |
} |
| 70 | |
|
| 71 | |
@Override |
| 72 | |
public Boolean getBooleanProperty(String key, Boolean defaultValue) { |
| 73 | 0 | String value = getProperty(key, null); |
| 74 | 0 | return value == null ? defaultValue : Boolean.parseBoolean(value); |
| 75 | |
} |
| 76 | |
|
| 77 | |
protected void fireConfigChange(ConfigChangeEvent changeEvent) { |
| 78 | 5 | for (ConfigChangeListener listener : m_listeners) { |
| 79 | |
try { |
| 80 | 5 | listener.onChange(changeEvent); |
| 81 | 0 | } catch (Throwable ex) { |
| 82 | 0 | Cat.logError(ex); |
| 83 | 0 | logger.error("Failed to invoke config change listener {}", listener.getClass(), ex); |
| 84 | 5 | } |
| 85 | 5 | } |
| 86 | 5 | } |
| 87 | |
|
| 88 | |
List<ConfigChange> calcPropertyChanges(String namespace, |
| 89 | |
Properties previous, |
| 90 | |
Properties current) { |
| 91 | 5 | if (previous == null) { |
| 92 | 0 | previous = new Properties(); |
| 93 | |
} |
| 94 | |
|
| 95 | 5 | if (current == null) { |
| 96 | 0 | current = new Properties(); |
| 97 | |
} |
| 98 | |
|
| 99 | 5 | Set<String> previousKeys = previous.stringPropertyNames(); |
| 100 | 5 | Set<String> currentKeys = current.stringPropertyNames(); |
| 101 | |
|
| 102 | 5 | Set<String> commonKeys = Sets.intersection(previousKeys, currentKeys); |
| 103 | 5 | Set<String> newKeys = Sets.difference(currentKeys, commonKeys); |
| 104 | 5 | Set<String> removedKeys = Sets.difference(previousKeys, commonKeys); |
| 105 | |
|
| 106 | 5 | List<ConfigChange> changes = Lists.newArrayList(); |
| 107 | |
|
| 108 | 5 | for (String newKey : newKeys) { |
| 109 | 2 | changes |
| 110 | 2 | .add(new ConfigChange(namespace, newKey, null, current.getProperty(newKey), |
| 111 | |
PropertyChangeType.ADDED)); |
| 112 | 2 | } |
| 113 | |
|
| 114 | 5 | for (String removedKey : removedKeys) { |
| 115 | 3 | changes.add(new ConfigChange(namespace, removedKey, previous.getProperty(removedKey), null, |
| 116 | |
PropertyChangeType.DELETED)); |
| 117 | 3 | } |
| 118 | |
|
| 119 | 5 | for (String commonKey : commonKeys) { |
| 120 | 6 | String previousValue = previous.getProperty(commonKey); |
| 121 | 6 | String currentValue = current.getProperty(commonKey); |
| 122 | 6 | if (Objects.equal(previousValue, currentValue)) { |
| 123 | 0 | continue; |
| 124 | |
} |
| 125 | 6 | changes.add(new ConfigChange(namespace, commonKey, previousValue, |
| 126 | |
currentValue, PropertyChangeType.MODIFIED)); |
| 127 | 6 | } |
| 128 | |
|
| 129 | 5 | return changes; |
| 130 | |
} |
| 131 | |
} |