Module: LogStash::Util

Defined in:
lib/logstash/util.rb,
lib/logstash/namespace.rb,
lib/logstash/util/loggable.rb,
lib/logstash/util/password.rb,
lib/logstash/util/byte_value.rb,
lib/logstash/util/decorators.rb,
lib/logstash/util/time_value.rb,
lib/logstash/util/thread_dump.rb,
lib/logstash/util/plugin_version.rb,
lib/logstash/util/cloud_setting_id.rb,
lib/logstash/util/cloud_setting_auth.rb,
lib/logstash/util/wrapped_acked_queue.rb,
lib/logstash/util/modules_setting_array.rb,
lib/logstash/util/dead_letter_queue_manager.rb,
lib/logstash/util/wrapped_synchronous_queue.rb,
lib/logstash/util/worker_threads_default_printer.rb

Defined Under Namespace

Modules: ByteValue, Decorators, DurationFormatter, FileTools, JavaVersion, Loggable, SecretStore, SettingsHelper, SocketPeer, SubstitutionVariables, UnicodeTrimmer Classes: Charset, CloudSettingAuth, CloudSettingId, DeadLetterQueueFactory, DummyDeadLetterQueueWriter, ModulesSettingArray, Password, PluginDeadLetterQueueWriter, PluginVersion, SafeURI, ThreadDump, TimeValue, WorkerThreadsDefaultPrinter, WrappedAckedQueue, WrappedSynchronousQueue

Constant Summary collapse

UNAME = 
case RbConfig::CONFIG["host_os"]
  when /^linux/; "linux"
  else; RbConfig::CONFIG["host_os"]
end
PR_SET_NAME = 
15

Class Method Summary collapse

Class Method Details

.class_name(instance) ⇒ String

Take a instance reference and return the name of the class stripping all the modules.

Parameters:

  • The (Object) —

    object to return the class)

Returns:

  • (String) —

    The name of the class



184
185
186
 
# File 'lib/logstash/util.rb', line 184

def self.class_name(instance)
  instance.class.name.split("::").last
end

.deep_clone(o) ⇒ Object 



188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
 
# File 'lib/logstash/util.rb', line 188

def self.deep_clone(o)
  case o
  when Hash
    o.inject({}) {|h, (k,v)| h[k] = deep_clone(v); h }
  when Array
    o.map {|v| deep_clone(v) }
  when Fixnum, Symbol, IO, TrueClass, FalseClass, NilClass
    o
  when LogStash::Codecs::Base
    o.clone
  when String
    o.clone #need to keep internal state e.g. frozen
  else
    Marshal.load(Marshal.dump(o))
  end
end

.get_thread_id(thread) ⇒ Object 



31
32
33
34
35
36
37
 
# File 'lib/logstash/util.rb', line 31

def self.get_thread_id(thread)
  if RUBY_ENGINE == "jruby"
    JRuby.reference(thread).native_thread.id
  else
    raise Exception.new("Native thread IDs aren't supported outside of JRuby")
  end
end

.hash_merge(dst, src) ⇒ Object

Merge hash ‘src’ into ‘dst’ nondestructively

Duplicate keys will become array values

src, dst[“foo”

]



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
 
# File 'lib/logstash/util.rb', line 67

def self.hash_merge(dst, src)
  src.each do |name, svalue|
    if dst.include?(name)
      dvalue = dst[name]
      if dvalue.is_a?(Hash) && svalue.is_a?(Hash)
        dvalue = hash_merge(dvalue, svalue)
      elsif svalue.is_a?(Array)
        if dvalue.is_a?(Array)
          # merge arrays without duplicates.
          dvalue |= svalue
        else
          dvalue = [dvalue] | svalue
        end
      else
        if dvalue.is_a?(Array)
          dvalue << svalue unless dvalue.include?(svalue)
        else
          dvalue = [dvalue, svalue] unless dvalue == svalue
        end
      end

      dst[name] = dvalue
    else
      # dst doesn't have this key, just set it.
      dst[name] = svalue
    end
  end

  return dst
end

.hash_merge_many(*hashes) ⇒ Object

def self.hash_merge



135
136
137
138
139
140
141
 
# File 'lib/logstash/util.rb', line 135

def self.hash_merge_many(*hashes)
  dst = {}
  hashes.each do |hash|
    hash_merge_with_dups(dst, hash)
  end
  return dst
end

.hash_merge_with_dups(dst, src) ⇒ Object

Merge hash ‘src’ into ‘dst’ nondestructively

Duplicate keys will become array values Arrays merged will simply be appended.

src, dst[“foo”

]



104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
 
# File 'lib/logstash/util.rb', line 104

def self.hash_merge_with_dups(dst, src)
  src.each do |name, svalue|
    if dst.include?(name)
      dvalue = dst[name]
      if dvalue.is_a?(Hash) && svalue.is_a?(Hash)
        dvalue = hash_merge(dvalue, svalue)
      elsif svalue.is_a?(Array)
        if dvalue.is_a?(Array)
          # merge arrays without duplicates.
          dvalue += svalue
        else
          dvalue = [dvalue] + svalue
        end
      else
        if dvalue.is_a?(Array)
          dvalue << svalue unless dvalue.include?(svalue)
        else
          dvalue = [dvalue, svalue] unless dvalue == svalue
        end
      end

      dst[name] = dvalue
    else
      # dst doesn't have this key, just set it.
      dst[name] = svalue
    end
  end

  return dst
end

.normalize(o) ⇒ Object

recursively convert any Java LinkedHashMap and ArrayList to pure Ruby. will not recurse into pure Ruby objects. Pure Ruby object should never contain LinkedHashMap and ArrayList since these are only created at initial deserialization, anything after (deeper) will be pure Ruby.



155
156
157
158
159
160
161
162
163
164
 
# File 'lib/logstash/util.rb', line 155

def self.normalize(o)
  case o
  when Java::JavaUtil::LinkedHashMap
    o.inject({}){|r, (k, v)| r[k] = normalize(v); r}
  when Java::JavaUtil::ArrayList
    o.map{|i| normalize(i)}
  else
    o
  end
end

.set_thread_name(name) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
# File 'lib/logstash/util.rb', line 12

def self.set_thread_name(name)
  if RUBY_ENGINE == "jruby"
    # Keep java and ruby thread names in sync.
    Java::java.lang.Thread.currentThread.setName(name)
  end
  Thread.current[:name] = name

  if UNAME == "linux"
    require "logstash/util/prctl"
    # prctl PR_SET_NAME allows up to 16 bytes for a process name
    # since MRI 1.9, JRuby, and Rubinius use system threads for this.
    LibC.prctl(PR_SET_NAME, name[0..16], 0, 0, 0)
  end
end

.set_thread_plugin(plugin) ⇒ Object

def set_thread_name



27
28
29
 
# File 'lib/logstash/util.rb', line 27

def self.set_thread_plugin(plugin)
  Thread.current[:plugin] = plugin
end

.stringify_symbols(o) ⇒ Object 



166
167
168
169
170
171
172
173
174
175
176
177
 
# File 'lib/logstash/util.rb', line 166

def self.stringify_symbols(o)
  case o
  when Hash
    o.inject({}){|r, (k, v)| r[k.is_a?(Symbol) ? k.to_s : k] = stringify_symbols(v); r}
  when Array
    o.map{|i| stringify_symbols(i)}
  when Symbol
    o.to_s
  else
    o
  end
end

.thread_info(thread) ⇒ Object 



39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'lib/logstash/util.rb', line 39

def self.thread_info(thread)
  backtrace = thread.backtrace.map do |line|
    line.gsub(LogStash::Environment::LOGSTASH_HOME, "[...]")
  end

  blocked_on = case backtrace.first
               when /in `push'/ then "blocked_on_push"
               when /(?:pipeline|base).*pop/ then "waiting_for_events"
               else nil
               end

  {
    "thread_id" => get_thread_id(thread),
    "name" => thread[:name],
    "plugin" => (thread[:plugin] ? thread[:plugin].debug_info : nil),
    "backtrace" => backtrace,
    "blocked_on" => blocked_on,
    "status" => thread.status,
    "current_call" => backtrace.first
  }
end